A five-year-old boy born with one hand has become the youngest ever person to be fitted with a bionic arm.

Jordan Marotta was left in a state of “pure joy” when he received his Iron Man-themed ‘Hero Arm’ prosthetic on Wednesday (22/5).

And heartwarming footage showed how just hours later, he was able to whizz around on his scooter while holding the handlebars with the arm's life-like grip.

Delighted Jordan said about his new mechanical limb: “It’s really fun and it’s cool. I like to play with the hand and make it open and close.”

His mum Ashley Marotta, 38, approached Open Bionics - which makes the prosthetic - when Jordan started questioning why his hand had not 'grown back'.