Get your tissues ready, because this is probably the cutest thing umm...ever!

Robert Downey Jr. -- a.k.a. Iron Man -- surprised a 7-year-old superhero lover, Alex, with a special present!  Alex, who has a partially developed right arm, was in the surprise for his life when a leading bionics expert and the Collective Project recruited Robert to give an Iron Man arm to the little bow-tied lad. Check out the adorable video below!

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