What people are saying - Write a review
We haven't found any reviews in the usual places.
Movers Floaters and Spotters
Spots and Colors
7 other sections not shown
afterimage angle ball begin bend blind spot bounce brain cardboard cereal cereal box circle Close one eye convex lens dark deck depth perception disc spins dots draw edge exactly faster file card Flipper floaters focus fold front glass glue grid happens Hold the pencil inch wide inches long inside jumping jacks lines in Illus look at Illus look directly looks like Illus Move your hand moving optical illusion notebook or typing notebook paper object Once perfect square periscope picture piece of paper pinwheel red square ring rolled paper seen in Illus sheet of notebook shown in Illus shows side slip the paper slits spin the disc Spinner spoon stick figures stiff material straight edge string strip of paper sure things thumb tiny trick tube turning base turning rod turning the toothpick turntable typing paper viewer viewing frame wheel