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KLUTZ-The Book Of Impossible Objects. Do the impossible twenty-five feats of very strange science! Each feat includes instructions on how to do it and what is going on in the picture. This package contains a 48 page book of activities and explanations, a genuine wobblestone, a set of hinged mirrors, an acetate animations viewer, a variety of cardstock curiosities and more. For ages 8 and up. Imported.