Planets Cutouts- no Pluto on this one, which makes Holst's "The Planets" complete again. :) The link suggests using these to play a heliocentric version of pin the tail on the donkey. Copernicus would have been a fan. :p
Love love love this planet system made from buttons (via http://www.redtedart.com/2012/04/11/kids-crafts-spring-colours/) I have some buttons I have been saving from my upcycled clothing pile that may work out great for this!