Tummy tickling fun of rocking it out again and again. Crazy Gander is inviting with bright colours and support for young bodies. Universal design supports 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, which 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.