The customizable Young Explorers Modular Play System from Simplay3 is made up of the Young Explorers Indoor/Outdoor Adventure Climber, Discovery Playhouse and Activity Climber. Each play unit can be enjoyed by itself - or joined to one or two of the other units to add to the adventure and build an even bigger play system. 12 different playset configurations to keep the fun fresh. Each set is sturdy, easy to assemble, sanitize and care for, and is recyclable. Best of all, it’s made in the USA and shipped directly to your door.