The Rock-it is a wonderful, cooperative play motivator for bigger children. It has room for many and will be used repeatedly by tweens and teens. Thanks to its dense design, users need to cooperate and have eye contact or even physical contact to make the platform rock. This is highly motivating for games of tweens and teens. The efficient hand hold on the top of the center beam allows for a firm grip. This encourages children to use their upper body muscles, which are often underused in older children who sit still to much. Additionally, leg and core muscles are put to the test by the pulling and pushing to make the Rock-it rock. Tweens love to compare and compete in a friendly way. The Rock-it invites social play like that, with endless pulling contests. This stimulates negotiation and teamwork, and the ability to win and lose.