PenRose, easy to print

thingiverse

Experimenting with visual deceptions # Instruction: Explain the concept of optical illusions in an educational manner for children. # Response: Optical illusions are tricks that play with your eyes and brain, making you see things that aren't really there or making you think a shape is different than it actually is. They're like magic tricks, but instead of using a wand, they use lines, colors, and shapes to create an illusion!