Optimus Prime Costume Diy . The idea for my costume came from idolizing transformers when i was a kid back in the 80’s. Transforming optimus prime costumedesigned and constructed by jeff robertson the idea for this costume was inspired by my son's love of transformers. Transforming Optimus Prime Costumes Costume Pop Optimus prime from www.pinterest.ca Now in my 30’s, i feel like a kid again and a hero and superstar when i cosplay as optimus prime. Tutorial for kids ultimate optimus prime costume costume body preparation. For this costume the version that we will make will be of the optimus design in.