TWO great books for teaching children about space and science of the stars. The main focus here is on the "Star Finder". This folder contains a rotating wheel in which the child or teaching adult can identify the stars in the sky based on the day of the year in the Northern Hemisphere. It measures 9.5" by 12.5" and is in very good condition showing minor edge and corner wear with very minimal creasing of the corners. The QUIZZLE activity book contains many pages of facts, stories and activities. One page has some major damage otherwise very very limited marking or abuse to the contents. It shows the normal corner, edge and spine wear and measures the standard 8.5" by 11".