Muppet Babies Colorforms 3-D Play Set is a 1985 toy. The playboard is illustrated with a theme park scene, including a roller coaster, a whirling rocket ride and a boat ride. Elements of the illustration are drawn in overlapping red and blue, which give the illusion of depth when viewed through the 3D glasses included in the set. Vinyl Colorforms pieces can be placed in the scene to show the Muppet Babies enjoying their day out.