The Yookidoo Tumble Ball Stacker is a two-in-one stacking and ball-drop toy designed for endless fun and sensory development. With five colourful stackers featuring interactive gears, flapping wings, and a flower funnel top, this engaging toy encourages fine motor skills, problem-solving, and cause-and-effect learning. Drop the rattling balls through the tower, watch them surprise your child by exiting randomly, and enjoy playful musical feedback that rewards curiosity and exploration.