The Asterion combines the Moon Belt, a flexible, rocking overhead activity with the Musca Spinner. The Musca Spinner generates challenging centrifugal forces as one or more children send it spinning. The core with Play Shell and Triangle provides a place to sit, lay or climb on, to watch the others or have a rest. Anchor and Stabile give access to the higher levels and the Moon Belt. The Moon Belt is secured at each side with half of a round tube for holding or standing while entering the wobbling activity.