Robosen's Optimus Prime Transformer robot truck gets an auto-converting trailer | Engadget
Transformers inspires Japanese toy maker's moon exploration robot - The Mainichi
New $700 Optimus Prime Transformers toy walks and transforms on its own - Polygon
Amazon.com: Transformers Toys Heroic Optimus Prime Action Figure - Timeless Large-Scale Figure, Changes into Toy Truck - Toys for Kids 6 and Up, 11-inch (Amazon Exclusive) : Toys & Games
LEGO Icons Optimus Prime 10302 Transformers Figure, Collectible 2-in-1 Robot and Truck Model Building Kit for Adults, Great Gift Idea - Walmart.com