The Rock-it is a wonderful, cooperative play motivator for bigger children. It has room for lots to play at once and will be used repeatedly by tweens and teens. Its dense design means users need to cooperate and have eye contact or even physical contact, to make the platform rock. The efficient hand hold on the top of the centre beam allows for a firm grip encouraging 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, stimulating negotiation and teamwork and the ability to win and lose.