Little ones will love to play with the ECR4Kids Softzone polyethylene (PE) balls. Shapes help to develop gross motor skills and encourage social interaction. The 2.7″ diameter PE balls are easy to clean. Combine with the ECR4Kids primary climber and ball pool and have the perfect indoor play set for any home, daycare or preschool. Balls can be used alone or as replacement pieces for ELR-0833, ELR-12624, and ELR-12670.