Children's Factory and Wesco climbers are soft mountains and tunnels and ramps and slides that children love to explore - just like having your own indoor playground. Each piece of a Children's Factory or Wesco soft play unit is a shape of dense foam covered in cleanable vinyl. These climber sets are just like giant building blocks that children can climb on and under. Not only do they help develop gross motor skills, but they provide imaginative play opportunities for children. And soft play mats make a wonderful cushion for playing with other toys, too.