Optical Illusion Children's Science Kit *Great Gift Idea* Optical Illusion Children's Science Kit. Over 20 optic fun activities with fun scientific explanation supplied. A cool science kit which guarantee hours of fun for all sorts of gathering. Contains 1 set of illusion tricks card of up to more than 15 illusion tricks, 1 set of spinning tops card with 4 spinning illusion cards, 3D pictures cards, 1 stencil and 2 markers for making simple 3D pictures, 1 3D glass, 1 pouch bag, detailed instruction with fun explanation of each optic activities. Great gift idea, presented in gift box as pictured.