Retailers selling good solar system models for children include Kohl's, Walmart and Amazon.com. The models come in various forms and sizes, including inflatable and glow in the dark sets. All of the retailers sell both two and three dimensional sets.
Sets available range in size from tabletop models to large models designed to hang from ceilings. Some hanging sets assemble into one piece, while in others, the planets hangs individually. Due to small parts, such as the planets, many of the models do not recommend use for children under the age of eight. A few, such as the inflatable sets, recommend a minimum age of three.