Walking on water? That's so pass. The Waterball from the Science Museum is the ultimatebeach ball that floats & "bounces" on water & instantly puts all other swimming pool & beach activities in the shade. With a lycra skin (like a diver's suit) it can be skimmed a long way across the water like a stone, providing you're able to put the effort into a good throw! Heard of Barnes Wallis & his bouncing bombs developed for the Dambuster raids? Well, this little bouncing sphere works much the same way, but is a lot less destructive. NB: Colour may vary. Made from polyurethane with a Lycra coating.