This inventive board book combines the STEAM themes and hilarious hijinks of the Rube Goldberg brand with a unique and exciting format to explore the key concept of opposites in a whole new way. On one side of the accordion-fold pages, discover 12 pairs of opposites-from hot and cold to young and old and shallow and deep to awake and asleep. Turn the book over to discover Baby Rube Goldberg's hilarious and out-of-the-box invention that includes all 12 sets of opposites and demonstrates a "simple" way to dunk a cookie in milk!