Just found this while snooping the internet this morning and had to add it to my blogs.
A couple of days ago I blogged about the dedication of some actors.
Then this morning I find this.

Downey (in character as Tony Stark) recently presented a robotic arm to young Alex Prince, a boy who is missing his right arm from just above his elbow.
The arm was made by Limbitless Solutions, a volunteer group started by Albert Manero, an engineering PhD student, who makes 3D printed bionic arms for kids….FOR FREE!!

So, not just actors with dedication!