This is an optical illusion toy called a thaumatrope. It has a different picture on each side, but when it’s spun around quickly we can see both of those images at the same time!

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How? It's all thanks to the persistence of vision! 👀

 

Print out the designs below, colour them in, and then watch my video to see how you can make these thaumatropes at home.

 

Watch to the end of the video to learn more about the science behind how this works!