A children's factory favorite is Corral Ball Pool (280 Balls). Our ball pool for ages 2 to 6 has 4in. thick foam walls 12in.h. and requires 53in. square floor space. Inside dimension 45in. sq. 280 balls 3+in. dia. in multi-colors, provide multi-sensory tactile stimulation as preschoolers balance, adjust, and move through them.