The Ultimate Book of Optical Illusions by Al Seckel Mugs Rehydrate after a rigorous lab

Rehydrate after a rigorous lab session and enjoy your beverage in style with the Periodic Table Tumbler Glass

creative tool for kids to click and construct 3D creations from flexible 2D shapes and powerful magnets

self-propelling sculptures as a new life form—ones that get their energy not from food but the wind

architecture

Available in adult sizes XS–XXL

The Ultimate Book of Optical Illusions by Al Seckel Mugs Rehydrate after a rigorous labPrepare to be amazed! Inside the covers of this incredible, colorful collection are hundreds of the world's most powerful optical illusions. They're beautiful to behold and stunning in their trickery. Some of the mind boggling images seem to spring into action, vibrating, pulsing, and spinning like a hula hoop. Other ambiguous illusions feature two subjects in one: the fun is in finding them both in the single pictureincluding a mouse playing hide and