2 years & up. Can you match the sounds to the objects? The Rainbow Sound Blocks feature five blocks with colorful acrylic windows and inset objects for experiencing five unique sounds. The chunky design is ideal for little hands to grip for shaking, building or displaying in and out of the smoothly sanded wooden storage box. Put the blocks away in the handy, wooden storage box. Encourage children to build their fine motor, sensory and identification skills. Measures 4.75"W x 2.75"D x 9"H.