Playground

A playground is an area designed for children to play in. Most playgrounds are located in parks, and typically consist of slides, seesaws, swing sets among other things.

There was an indoor playground located in the secret base of Doctor Rebos. Doctor Rebos locked Marvin White, Wendy Harris and Wonder Dog in there, when they were attempting to meddle in his affairs. There was an android-assembling kit and a food and drink machine located in the playground, as well as typical playground equipment.

While Superman was doing a sky watch for crane-copters at the Power & Electric Company, he sees rocks were rolling down the mountains all by themselves, as if they were alive, toward a valley below. Instantly Superman flies into action, realizing that there is a zoo located down there,