Transformers One Coloring Book Set - Bundle with Activity Book Featuring Optimus Prime Plus Stickers, Crayons, More | Transformers Coloring Set for Boys, Girls, Kids. This Transformers One coloring set includes a Transformers coloring book featuring tons of pages filled with illustrations of Optimus Prime, Bumblebee, and other Transformers One characters. This Transformers coloring and activity book will be the perfect addition to any birthday party as party supplies, party activities, party favors, or goodie bag fillers! Complete with a large array of Transformers One coloring and activity pages, this Transformers coloring book set is perfect for all Transformers fans, boys and girls alike. Officially licensed Transformers One coloring and activity book set for kids also includes Transformers stickers, 4 crayons, and a Rex-Man door hanger.