Get ready to shake, rattle, and roll with the Discovery Set Round and Round! Things really start to roll for little ones: the barrels, balls, and rotating disks allow kids to delve into the fascinating world of optics and discover impressive motion effects. The parts can be assembled in many different ways. The little discoverers can let their imagination run wild when stacking, rolling, and rocking. Perfect for 2 years and older. Contents: 3 basic wheel chassis, 1 set of wheels, 2 effect balls, 1 spinning top, 6 color disks to stick on the spinning top, 8 barrels, 1 ringing roll.