Welcome to Cool Optical Illusions! Whether it’s your first time here or you’ve been visiting us for almost 15 years, we hope you enjoy your visit today. (Choose an item from the menu above to explore tons of optical illusions!) Our work has been featured in Science Museums around the world (really!) and hundreds of classrooms too.
We’ve been serving up the coolest for quite some time now. Many of the optical illusions on this site are unique because we made them specifically for the site. One of the most popular is the printable template for making your own impossible triangle. Teachers often use it as a lesson plan to get kids interested in the science of perception. However, if you just feel like staring, you can see a nice image of Jesus staring right back at you, as if by magic. Now, if you want a bit of a challenge, check out the purple cat illusion. There’s a lot going on with that one. You might want to explore it a bit first before you read how we packed in multiple tricks for it to work.