ENDLESS WAYS TO PLAY: 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! QUALITY BUILT: Easy to grasp rainbow arches are embossed with numbers one through five to encourage learning and number recall and sequencing. LIGHTS & SOUNDS: 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. EARLY CHILDHOOOD DEVELOPMENT: Stimulates creative thinking and encourages hand-eye coordination for children ages 6-24M. PRODUCT SPECIFICATIONS: Package contains Musical Stack & Learn Rainbow with 5 Rainbow Arches and Cloud Base. Requires 3 "AAA" batteries, included.