Stack Flap N' Tumble is amazing, engaging fun that really stacks up! Stack up 5 big, colorful pieces, then drop three balls down the center. The soft, crinkly wings flap as the ball passes through. Hear fun sounds when they hit the bottom and come tumbling out. Each stacking block has a clicking or rattling activity designed to encourage exploration and hone motor skills. The flower funnel face features soft petals for tactile discovery. 3 AA batteries required, not included.