Category Archives: Optical Illusions

Houdini Illusion Color-Changing Mug

By Tom Interval Okay, so you have to check out this mug—one of the coolest out there (see the 1 min. 49 sec. embedded video below). Yes, I’m a bit biased since I’m the one offering it on the Interval Magic CafePress Store. However, I … Continue reading

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Houdini Optical Illusion

Hope you enjoy the following Houdini optical illusion, inspired by an illusion I saw on the Mighty Optical Illusions website. Tom Interval (Copyright 2013 Tom Interval. Reproduction for commercial purposes prohibited.)

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