3 years & up. Let's make some noise with these fun sound shakers! These sturdy wooden boxes are easy to grip. Have children shake the wooden cubes to hear each unique sound and find its match. To self-correct, simply look through the provided translucent-colored, acrylic base. These Peekaboo Sound Boxes develop matching, concentration, fine motor, sensory, problem solving, and cognitive skills. The set includes 12 sound boxes with six unique sounds and a storage base.