The Smithsonian Astro Lab Planetarium lives up to its lofty name, featuring three different functions, including (1) the Projection Planetarium, which allows you to project the stars and constellations, creating a beautiful starry night even in the daytime; (2) the Light-up Solar System Model, which makes learning about the planets fun, very interesting, and easy; (3) the Light-up Earth and Moon Model, which teaches you all about the haunting phases of the earth and moon. Best of all, the Planetarium can be changed from one model to another in mere minutes; no headache, no hassle; just the joy of discovery! Recommended for ages 8 and up, the Planetarium includes an instruction booklet that not only gives detailed instructions on how to assemble the set, but facts and details about each of the planets as well, and a brief, thoughtful history of the Smithsonian Institution.