The hamleys light sound fusion ball is a self bouncing ball and it will cause giggles and minor mayhem wherever it goeslights beats music and motion its everything boys and girls could want from a toy we know noise and bouncing might be the last thing you want to endure the first thing christmas morning or indeed any morning for that matter but this really will keep them amused and it includes batteries so no elephant memory or desperate scrambling requiredrequires 2 x aaa batter