Tom Kenny — American Actor born on July 13, 1962,

Thomas James "Tom" Kenny is an American actor and comedian. He is known for his long-running role as the title character in the SpongeBob SquarePants TV series and films. Kenny has voiced many other characters including Heffer Wolfe in Rocko's Modern Life, the Ice King in Adventure Time, the Mayor in The Powerpuff Girls, Dog in CatDog, and Spyro from the Spyro the Dragon franchise. His live-action work includes comedies The Edge and Mr. Show... (wikipedia)

He's not a child but he's childlike, he's not a grown up, he's not a kid, maybe he sounds like an elf on helium, we'll play with it.
People are always saying that I must have been the class clown, with all these voices. No, I was way too shy to be the class clown; I was a class clown's writer.
I seem to voice a lot of sweet, kind of dumb yellow characters for some reason.
You have to remember we're just performers, that we seldom have any kind of grasp on real life.
I just felt like there was a world of cartoon voices that had to be discovered by me.