Small and Large Illusion

Boomerang shapes seem to grow larger – then shrink again – right in front of your eyes. You may fool yourself as you perform this… but don’t believe everything you see!


Did You Know?¬†This illusion is known as¬†The Jastrow Illusion, published in 1873. It’s almost 150 years old! Here we add a new twist to an old illusion to make it a little more amazing! Remember, it’s fun to learn and practice a trick like this, but it’s even more fun to share it with an audience. Once you make your own Small & Large illusion, who can you show it to? I bet they’ll love it!

Setup & Preparation

Printing Notes:

  • The back side of the sheet is for decoration only, it is not necessary.
  • You can print the black-and-white sheet to design and decorate your own shapes. Color them any way you wish to!


Additional Ideas:

  • You can cut shapes like this out of any material. What happens when you make them longer? Or narrower?
  • Sometimes you can find curved shapes like this around the house. Toy railroad tracks, coffee cup sleeves, or even sectional couches. Do they appear larger or smaller side-by-side?

Bonus: Magic Tip of the Day

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