A teeter-tottering pendulum to please the ears! Between the two transparent windows is a little mallet suspended in the middle and a unique bell tone attached to either wall. Send it rocking and listen as the hammer swings back and forth to strike the bells. Young minds instantly light up with fascination! Simple yet endlessly mesmerizing, Tobble Tones is a unique cause-and-effect experience curious young minds can't help but come back to again and again.