Six shapes make up this set - a stair, a rectangle, an arch, a cylinder, a slide and a cushion - and rearranging them is half the play, since a two-year-old builds a different course each time. Sizes run from a 9.5 in cylinder to a 20 in arch and a 20.5 in slide. Foam under plush velvet gives a surface soft enough to land on and warm to sit on. Nothing needs assembly. The set weighs 10 lbs and suits children from 3 years, indoors on a rug or a playroom floor.