25 Eye-Popping Projects and Illusions * Comes with: wobblestone, hinged monster-making mirrors, acetate animations viewer * Also includes a variety of custom-designed cardstock curiosities (optical spinners, balancing acrobats, transforming sign, 3D stare-o-saurus, phenakistoscope wheel, flexagon labyrinth) * Written By: Pat Murphy and the Scientists of Klutz Labs * Ages 8+