Let’s Do The Numbers

lets-do-the-numbersWelcome to the number mines of Digitopolis, the famous kingdom from The Phantom Tollbooth! This fall, we hosted a table at Princeton University’s annual Community & Staff Day event. Big crowds meant that we needed something simple, but we wanted to be creative too. Since we had successfully offered the number mines at a massive math event last spring (you can read about it here and here), we decided to bring them back for more numerical fun.

Alas, the original number mine (which was artfully constructed by the Arts Council of Princeton) wasn’t salvaged after the math event. This meant that Katie and I had to build our number mine from scratch. The first part of this post describes how we ran the event table. The second part describes how we build the mine.

At the event, kids would reach into the number mine and pull out a plain wooden number. I bought the numbers online from Woodcrafter, where they range in size, thickness, price, and font. I got the 4″ numbers that were 1/8th of an inch thick. Each number cost 56¢.

wooden-numbersWe found that 4″ was a great size for decorating, but if 56¢ per piece is outside your budget, you can go smaller. A 1″ number of the same thickness, for example, costs 23¢. Or, if you want to go even cheaper, skip the wood and print your numbers on white card stock. We loaded the numbers into the mine, and the kids “dug” them out with their hands.

reaching-in-1Once kids found a number they liked (7 and 8 were very popular), they went over to the number decorating area, which was stocked with metallic makers, glitter markers, small gemstones, and glue. We had a relevant quote from the book on display too. Kids really got into decorating. One little girl spent 25 minutes working on her number!

decorating-the-numbersNote! If you use squeeze glue (as opposed to hot glue) make sure to have paper towels or small paper plates handy so families can safely transport their numbers home. Hand wipes are also a good idea for sticky fingers and tabletops. Katie and I dressed for the occasion in miner’s helmets and safety vests.

dr-dana-and-katie-number-minesSo, that’s our event table…now for constructing the mine! You certainly don’t have to get as elaborate as we did. You can create a mine by covering a box with grey paper. Cut a hole in the box’s lid, throw some numbers in there, and have kids reach into the box! Or you could skip the mine altogether and just do the number decorating part of the project. But if you do want to build a mine, here’s how we did it.


STEP 1

Find a big, flat box that isn’t too deep. You don’t want kids to have to reach too far down for the numbers – especially the little ones. We used a 34″ x 54″ inch box lid, and then attached 6 photo storage boxes to the bottom using hot glue and packing tape. This resulted in a mine that was 5″ deep. Here’s a shot of the underside.

number-mine-step-1Since the box lid didn’t reach all the way to the bottom of the photo storage boxes, we closed the gap by attaching big strips of corrugated cardboard to 3 sides of the mine. We left it the mine open in the back so we could restock numbers during the event.


STEP 2

Cut holes in the top of the box. We found it helpful to draw the holes before we started cutting. That way, we could be sure we weren’t cutting into any of the support boxes and we knew that the numbers would fit through the holes.

number-mine-step-2


STEP 3

Create the rocky, craggy landscape of your mine. We bunched up big pieces of black bulletin board paper and attached them to the box with masking tape (you might recognize that texture from this Instagram pic).

number-mine-step-3


STEP 4

Now for the really, really messy part. Papier-mâché. We don’t have a sink in our work space, and the nearest bathroom is far, far away. So we wanted to create the smallest mess possible. In other words, we didn’t want to cook, mix, or blend any sort of papier-mâché paste (or dilute any glue). After a little research, we settled on liquid starch.

Below are our tools – 2 enormous jugs of liquid starch, 2 plastic roller trays, and 4 paint brushes (the bristle brushes worked better than the foam ones). Oh, and we also put a plastic tarp under the mine so we wouldn’t ruin the table.

number-mine-toolsSince we had a lot of area to cover, we used big, 6″ x 16.5″ pieces of newspaper. Occasionally, we use a smaller strip for edges or crevices, but mostly we stuck with the big ones.

number-mine-step-4_1The liquid starch held up well! It did coat our hands with sticky residue that required multiple rounds of soap and scrubbing to remove, but it wasn’t too bad. Honestly, the worst thing about the liquid starch was the fact that it was scented. “Mountain Fresh” scent to be exact. Hoo boy. You could smell the mountains the minute you took the cap off. After a couple minutes, the fragrance was looming in the room like a big, ominous fog. Katie put together a little graphic to convey the overpowering Mountain Freshness.

mountain-fresh-freakoutWe left the first layer to dry overnight. For the second layer, we got a little experimental. While researching liquid starch, we learned that some people absolutely rave about using white paper towels and computer printer paper for papier-mâché projects, especially if the projects are going to be painted later. So we decided to give it a try. We papier-mâchéd the bottom of the mine with paper towels, and the top portion with computer printer paper.

number-mine-step-4_2Wow, did the paper towels suck up the liquid starch! The printer paper needed much less. But the printer paper was so stiff, it created unwanted gaps like this one:

stiff-gap-problemThe solution was to drape a liquid starch-soaked paper towel over it. Below is that same gap with the paper towel over it. As you can see, the soft paper towel completely obscures the gap. I didn’t officially test this, but I believe newspaper would obscure gaps as well, perhaps even better than the paper towels.

stiff-gap-problem-solvedI was a little worried the paper towels were too transparent. But overnight, they magically dried to solid white.

number-mine-step-4_3In the above photo, you can see there were still wet patches in crevices where the liquid starch had pooled. Katie hit those with a hair dryer, no problem. And we should add that, even now, things were still smelling quite Mountain Fresh.


STEP 5

Time to paint! We used this awesome textured-stone effects spray paint by Valspar. It’s fun, but pricey ($10 a can at Lowe’s). Our mine required 3 cans.

stone-spray-paintA cheaper option would be to use gray paint to cover the mine, then dab on darker gray  with a piece of sponge. This will get you a textured surface, without the hefty spray paint price. Once the spray paint had dried (which, we might add, finally dissipated the Mountain Fresh fragrance), we decorated some numbers and attached them to the mines with hot glue. We hot glued some large plastic gems on as well – purchased from the wedding favor aisle at Michaels Craft Store.

number-mine-step-5And this, dear readers, is when we discovered the fatal flaws in regards to paper towels:

  1. When dry and spray painted, paper towels become incredibly brittle. I poked a hole right thorough one section while merely tapping on it (we eventually covered the hole with the number 8).
  2. The texture of the paper towel absolutely comes through in the end. So if your paper towels have little hearts embossed on them, you’re going to see little hearts under the paint.
  3. The edges of the paper towels are clearly defined. Unlike the newspaper and the printer paper, you can definitely see the edges of the paper towel under the paint. So our rocky surface looked like, well, draped paper towels. You could even see the dotted perforations that separate the paper towels.

paper-towels-not-goodThe printer paper, on the other hand, was much sturdier and the edges were hidden under the paint. The lesson? DON’T use paper towels for papier-mâché projects. Use newspaper and printer paper instead. In fact, I highly recommend printer paper for the second layer of painted papier-mâché projects. Very sturdy, holds paint very well.

However, paper towels are what we used and their brittle weakness made me and Katie very, very nervous. We were positive that kids were going to put their hands right through the mine as they leaned in to select numbers.

reaching-in-2Anticipating trouble, we brought duct tape and a couple of step stools to the event. The stools elevated the kids right up to table level, allowing them to keep their weight mostly on the stools and not on their hands. So the paper towels held, but there were a couple time you could see them bending. Katie and I would brace ourselves for a tearing, crunching, breaking sound. Thankfully, it never happened. Whew!

Glow, Pumpkin. Glow!

pumpkin-balloonA no mess, no carve, no flame, gorgeously glowing pumpkin? You got it! Bounce these LED pumpkin balloons around at your next story time, sneak a few on the shelves on the 31st, or take a spirited evening stroll.

You’ll need:

  • 1 orange LED balloon
  • A black Sharpie permanent marker

I first spotted these LED balloons at JaZams, our local toy store. They’re made by a company called illooms. A variety pack of 5 latex balloons cost $6 , and a pack of 15 balloons cost $13. I’ve also seen illooms sold online at Oriental Trading Company, Amazon, and Walmart for varying prices. Party City sells just the LED bulbs (12 for $10). So that’s an option as well – buy the bulbs and a package of orange balloons.

illoom-led-balloonsThe illooms LED balloon has a round, hard tip at the top, and a tab sticking out of its neck. Pinch the tip while simultaneously pulling the tap to activate the LED. Then inflate the balloon (the directions suggest a pump, but I went with my lungs).

deflated-balloonThe round tip acts as a balloon weight that pulls the inflated balloon upside down, creating the the perfect pumpkin shape. Use a black Sharpie permanent marker to draw a pumpkin face on the balloon, and you’re good to glow!

Looking for a few more simple Halloween projects? Try a toilet paper roll jack-o’-lantern, a hanging bat exhibit, a shoulder snake, or an herbal amulet to ward off those pesky goblins. And as long as were talking about spooky orange vegetables, take a look at this Creepy Carrots story time.

way-creepy-carrots

A Real Howler

a real howlerMessed up on a test at school? Misplaced your toad? Stole your father’s flying car? Brace yourself – you might be getting a Howler in the mail.

You’ll need:

  • An 8.5″ x 11″ piece of red poster board (or red card stock)
  • Extra red poster board (or red card stock) for pop-up elements
  • A few pieces of white card stock
  • Markers, pens, and/or color pencils for writing and decorating
  • Scissors and tape for construction
  • Optional (but fun!): sparkle stems, foil star stickers, and bits of red mirror board

While there are templates and patterns for the Howlers you see in the Harry Potter movies, some of them can get a little complicated. The folks who staffed the Howler table at our Harry Potter event wanted something kids could do with minimal instruction and assistance. As it turned out, kids of all ages loved making these simple pop-up cards. The table was hopping for 5 hours!

Our Howler is an 8.5″ x 11″ piece of red poster board (or card stock) folded in half. We offered 4 pop-up elements for the interior of the card: 1) Basic accordion fold; 2) Clustered accordion fold; 3) Spiral; and 4) Zigzag accordion fold.

four pop-up elementsTo make the basic accordion fold, take a strip of paper and fold it back and forth until it resembles a stair case. Attach one end to the card with tape. We cut a number of different size strips and let kids pick and fold the ones they wanted. We also had rectangular pieces available in case kids wanted to cut and fold a cluster of accordion folds.

To make a spiral, cut into a circle of poster board (or card stock), circling inwards until you reach the center. Attach one end to the card with tape. We prepared large and small circles in advance, and let kids pick and cut their own spirals.

To make a zigzag accordion fold, cut a zigzag into a strip of paper, and then fold along the straight points of the zigzag, like so:

zigzag foldWe had sparkle stems, foil star stickers, and little bits of red mirror board available to decorate the cards (the idea was to make it look as explosive as possible, so lots of red and gold)!  Finally, write magical crimes and consequences on pieces of white card stock and attach them to the card or pop-up elements. Feel free to add illustrations as well (like Marissa’s fantastic broomstick in the image below? And did you notice the little exclamation marks popping up on accordion folds?).

a real howlerTsk tsk tsk Beatrix. You really should be more responsible with your broom.