Mattel Minions Shrink a Doodle Keychain Kit Kids will love creating their own Minions-themed keychains! Create personalized keychains that are fun to make?first bake the shrink art. When it cools, combine with other decorations to create unique keychain designs. Set comes with lots of exciting crafting tools, including shrink art pieces, colored pencils, beads and more!. Kids can show their creativity and their love for Minions: The Rise of Gru! A great gift for girls and boys age 6 and older.