A Constructive Playthings exclusive, these multiple award-winning wiggly giggly fun balls make wild noises when you turn, roll and shake them! This colorful set makes a fabulous addition to your sensory development playtime at home or in the classroom, as little learners explore new sounds and sensations. 4" diam. Sold as a set of 3, colors may vary. No batteries required. Ages 6 mos.+