Demonstrate rotation, revolution and orbit, teach the position, order, size and shape of the planets and sun. When the lesson is over, hang everything from the ceiling on the hooks provided. Deflates for easy storage. Made of durable, washable plastic. Set includes: 91.4cm sun, 55.9cm Jupiter, 45.7cm Saturn (with rings), 35.6cm Neptune, 35.6cm Uranus, 30.5cm Venus, 30.5cm Earth, 25.4cm Mars, 35.4cm Mercury, 20.3cm Pluto, and 20.3cm Moon, Teacher's activity guide and convenient foot pump. .