Tag Archives: illusion

The Ghost Post

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ghostbustersIt’s a special week for hoots and haunts, so we’re delving into the blog archive to deliver our most ghostly posties for your Halloween celebrations!

We’ll begin with the haunting of this prime piece of story time real estate. After reading I’m Not Afraid of this Haunted House (Carolrhoda Books, 2005), kids built a “Haunted House Kit” then headed into House 13 to bust some ghosts:

i-aint-afraid-of-no-ghostMoving on to a different house, different haunting, we read Ghosts in the House (Square Fish reprint edition, 2010). After crafting a classic ghost chest, kids had to locate multiple phantoms spirited away in our elaborate four floor dollhouse!

ghost in laundry room

If you’re looking for a delightful book to share this Halloween season, we highly recommend Gustavo the Shy Ghost (Candlewick, 2020). We paired our reading with a glow lanterns and gallery ghosts. And if you’d like to visit the studio of the book’s author and illustrator, Flavia Z. Drago, you’ll find that here!

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Want to get a little more sophisticated? Try building our tabletop Pepper’s Ghost illusion.  We also tried a more basic variation of the illusion using a phone and a plastic drink lid!

seeing spiritsFor simpler – but no less spooky – apparitions try this oatmeal container projector that produces a ghostly figure on your wall or door.

thats a big bunny 3And speaking of optical illusions, we dug through Cotsen’s special collections and discovered a really cool book from 1864. Spectropia allows the reader to experience the scientific concept of afterimages. The post contains multiple spooks for you to try!

book cover 3We’ll conclude our Halloween post with a ghostly guppy. We read Goldfish Ghost (Roaring Brook Press, 2017) and crafted this simple paper plate goldfish marionette that of course hangs upside down. It was quite a hit at story time!

ghostly guppie

HAPPY HALLOWEEN!

Pepper’s Ghost, Part II

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this hummingbird 1_edited 1This is not the first Pepper’s Ghost illusion to appear on Pop Goes the Page. Back in 2020, we posted a kid-friendly version featuring a spirited fox. The illusion is basically a reflection trick, but it’s very effective when done right!

seeing spirits   You’ll need:

  • A clear plastic drink container lid
  • Paper (heavier paper or thin cardboard works best)
  • A small section of clear plastic (like the lid of a food container)
  • Scissors and pencil for construction
  • Cell phone

The project was originally designed and posted by artist Joshua Ellingson on his Instagram. First, wash a clear plastic drink lid. Then cut a half circle template out of paper. When you have a half circle that correctly fits at a 45 degree angle inside your cup lid, trace the paper template onto a piece of clear plastic. We used an acrylic gift box, but plastic food containers work great too. Tape the plastic half circle inside the cup lid. The hardest part is getting that 45 degree angle just right. I made about 4 templates before I finally nailed it. Here’s my finished cup with the plastic half circle:

Head to YouTube for a Pepper’s Ghost illusion on a black background. We tried a couple different ones, but had the most success with this hummingbird. Cue up the video on your phone, maximize it to full screen, and lay the phone on a tabletop. Place the cup lid on top. Finally, roll the video and turn off the lights! Your object will appear to float inside the cup lid! It’s really quite remarkable.

The original designer, Joshua Ellingson, also made a GIANT version of this craft with a thrift store bubble chair and his flat screen television. It’s a must see! And Disney’s Haunted Mansion famously employs this illusion, including an entire ballroom of ghosts!

Cotsen Ghosties

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book cover 3Last Halloween season we took a stroll through our special collections pumpkin patch. Today, we’re looking for ghosts! And we found them in this amazing optical illusion book titled Spectropia; or, Surprising Spectral Illusions. Showing ghosts everywhere, and of any color. Published by J.H. Brown in London in 1864, the book teaches the concept of “the persistency of impressions, and the production of complementary colours on, the retina.”

The illusion is very simple. In the image above, stare at the small black dot by the ghost’s neck for 20-30 seconds. Then look away at a white wall or ceiling. Her ghostly image will appear in your vision, except in different colors (in this case green wreath, blue ghost)!

Scientifically speaking, this is called an afterimage. The color receptors in your eyes work in pairs (red/green, blue/yellow, etc.). When you stare at the drawing and one color fatigues your receptors, the other receptor will step in and dominate for a bit.

The book has a very lengthy description of this concept, as well as viewing instructions that include having the “gaslight turned low.”

Spectropia also has a disclaimer at the beginning: “As an apology for the apparent disregard of taste and fine art in the plates, such figures are selected as best serve the purpose for which they are intended.”

I wish they might have reprinted the disclaimer before THIS image, which honestly is going to haunt me clear through December:

The book concludes with a grand finale image that is not a ghost, but a rainbow! Definitely try this one, because it is so cool to see the colors flip in the afterimage!

Looking more more optical spooky fun? Try making our tabletop Pepper’s Ghost illusion!

Images from Spectropia; or, Surprising Spectral Illusions. Showing ghosts everywhere, and of any color. J.H. Brown, London. Griffith and Farran.1864. Cotsen Children’s Library, Department of Special Collections, Princeton University Library.