A lovely tool to explore the night sky while building and playing with your kiddo. Each block shows a constellation with and without connecting lines, the constellation symbol, name, hemisphere, and scale of magnitude. The set of 16 blocks are made using sustainable Midwestern basswood and are 100% made in the USA. They are printed with non-toxic and mouth safe ink. One block measures 16 - 1.75 inch. For ages 2+.