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Creating fake boogers? Stink bubbles? When it comes to kids, "ick!" makes scientific principles stick! Twenty revolting experiments give kids a puke-worthy preview of basic chemistry, including polymers, diffusion, reactions, gas expansion and more. Includes mechanical toilet bowl mixer with "flushing" sound effects, trashcan beaker, toxic waste can beaker, rat-shaped eyedropper, worm stir stick, bubble wand, a filthy work tray and a full-color, 24-page book with step-by-step instructions. Toilet bowl mixer uses two AAA batteries (not included).