Robert Downey Jr. just gave us another reason to love him for his magnanimity, as he recently gifted a bionic Iron Man arm to one of his younger fans.

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Non-profit prosthetics company Limbitless Solutions' Albert Manero, a college student, builds and donates prosthetic bionic limbs to donate to kids had a huge role in making this happen. Downey Jr. actually wanted to help Manero with his #collective project, and make a kid's dream come true.

The clip that captures this moment, shows the actor giving the limb to a seven-year-old Alex who is a superhero fan with a partially developed right arm. The actor, who got into character as Tony Start, draws the kid into Iron Man's fictional world asking Alex if he would like to try on a bionic arm with him. The video will make your heart melt some.

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Downey Jr. is most likely not coming back for the fourth installment of Iron Man, and he pretty clearly stated that in a recent interview. He suggested having to drop Iron Man 4 for his upcoming movie Captain America 3: Civil which he'll play Tony Stark/Iron Man.

Speaking to Empire magazine, the actor talked about how Civil War might not have come to be, had he gone ahead with Iron Man 4.

"They said to me, 'If we have you, we can do this, or Cap 3 has to be something else.' It's nice to feel needed. And at this point it's about helping each other, too," he said. "I look at it as a competition and I go, 'Wow, maybe if these two franchises teamed up and I can take even a lesser position, with people I like and directors I respect, maybe we can keep things bumping along.'"

Watch the clip of Downey Jr. gifting Alex the bionic limb here: