Musical Stack & Learn Rainbow from Kidoozie is classic stacking toy with 5 colorful rainbow arches that stack up to 12 inches tall. Grows along with your child with multiple ways to stack and grooves that interlock! Easy to grasp rainbow arches are embossed with numbers one through five to encourage learning and number recall and sequencing. Motion activated lights and sounds for stationary play! Rock the cloud base and watch it light up and play delightful melodies including Twinkle Twinkle Little Star and You Are My Sunshine. Stimulates creative thinking and encourages hand-eye coordination for children ages 6-24M. Requires 3 "AAA" batteries, included.