Eye Think Strobotop LightPhase Animator - Animator that Makes Pictures Come to Life - 10" TEACHES ABOUT ANIMATION TECHNIQUES: Illustrates the principals of animation and how the mind perceives motion pictures! DIMENSIONS: Strobotop measures 10 x 7 x 3 inches GREAT NEUROSCIENCE TOOL: Makes the perfect addition to any medical classroom in teaching neurological process of how the brain and how it perceives different motions. OLD AND NEW TECHNOLOGY: It combines the old with the new, marrying a simple spinning top with cutting-edge LED technology to make pictures come to life and move. BATTERIES NEEDED: Requires 4 AAA batteries, not included.