3 balls included. This is the Slide & Seek Ball Run from the Babbler Play Kit for 13-15 Months. Spiral slide design with multiple door openings. More details: Balls roll down and disappear into a wooden box—a fun lesson in object permanence. Your toddler may be finding their voice and their special place in the world. This Play Kit offers new challenges in balance, object permanence, and spatial awareness, as well as an early introduction to physics. * Learn fun lessons in cause and effect * Build fine motor skills * Get more comfortable with routines and time * Explore rotation, spatial relationships, and parts of a whole