From the Seattle Parks web site, "Designed for children 5 and younger, Toddler Gyms and Indoor Play Areas offer a variety of toys and larger space to play indoors. Children will enjoy toys, balls, trikes, scooters, push bikes, and more. These spaces are designed specifically for younger children in mind and provide a great place to play on a rainy day! Parental supervision is required at all times while playing in our indoor areas. " Cost is $3 per child