See the difference this hands-on math manipulative can make! Children learn addition by watching the process play out before their eyes. Simply put the magnetic funnel, cups and tray on any magnetic-receptive surface, like a whiteboard, then send the balls through the cups to demonstrate simple addition concepts. Set includes 2 cups, a funnel, 20 balls (10 green, 10 purple) and a tray measuring 11 in. Size: 29.2 x 17.5 x 10.2 cm. Ages 4+.