Ingenious kit containing plastic granules which, when simply mixed with water, can be turned into bespoke bouncy balls. A mixture of up to five colours can be poured into one of the three supplied moulds (one large, spherical design & two small, irregularly shaped ones), immersed in water, & then split open after four minutes to reveal a superbly bouncy creation. There are ten sachets of granules included (two of each colour) so between four & ten balls can be made following the enclosed instructions.