6 months & up. Toddlers will delight in the two different styles of spinning domes. The Popping Ball Dome sounds like popping popcorn and contains uniquely patterned balls. The Tumble Ball Dome contains smaller balls with different expressions and has a softer sound and slower movement. These colorful and exciting domes are sure to capture your children's attention. Stimulate sensory learning and build fine motor skills with just a push on the spinner's handle!