EQUIPMENT NEEDED: sink, aquarium, or bucket, various object that sink or float--blocks of wood of different size and shape, candles, balls, plastic objects, etc., etc., balls of clay, aluminum foil, marbles or other weights, corks or styrofoam, thumb tacks and pins, waterproof food storage boxes (eg.
(various object; sink; ) (various object; float; )
various object various object
sink float