The amazing Crazy Gander should be in all playgrounds. Children seek it out to rock and play again and again. The Crazy Gander is truly universal design: the back, calf and foot supports, the shelter of the seat sides and the vertical handholds make it accessible and usable for all. Children rock the Crazy Gander using their leg, arm and core muscles to coordinate movements and set it into motion. Alternatively, the spring will move when children stem their back into the seat, without using leg muscles. The hand-holds support a relevant grip height for all. Rocking the Crazy Gander supports the senses of balance and space, that are fundamental for body confidence and movement control. The spring's response to movement builds an understanding of cause-and-effect. It supports logical thinking, a fundamental cognitive skill.