Based on the hit cult book Professor Astro Cat's Frontiers of Space, these out-of-this-world flash cards are fun and educational for parents and kids alike!This deck of flash cards creates astronomical family fun, especially for fans of Ben Newman's exciting, colorful art from the children's nonfiction book Professor Astro Cat's Frontiers of Space. These flash cards cover everything from the solar system to space travel, exploration and discovery, and more to help your cadets learn as much about the universe as Astro Cat. With full-color cards featuring delightful mid-century art from the book, these flash cards make learning about space truly stellar.