With a ton of cardboard boxes, you could make your very own Optimus Prime costume | Mashable
Awesome Transformers Costume DIY Transforming Optimus Prime
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Optimus Prime Costume : 17 Steps (with Pictures) - Instructables
Optimus Prime Costume : 17 Steps (with Pictures) - Instructables
The Ultimate Optimus Prime Costume Tutorial
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8 Best Homemade Transformers Costumes on Earth - The News Wheel
DIY Optimus Prime Costume for Men | Last Minute Costume Ideas
Transformable Optimus Prime Wearable Costume for Kids digital - Etsy
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Optimus Prime Costume, Inflatable Transformer Costumes for Boys, Kids Size Fan Operated Expandable Character Blow Up Suit : Toys & Games - Amazon.co.jp
Transforming Optimus Prime Costume DIY
Optimus Prime Costume : 17 Steps (with Pictures) - Instructables