I'm looking for talent scouts, modeling agencies, acting schools &/or any auditions for my 4yr old son.?

Any preferences, suggestions, recommendations, or any knowledge of where to start? And I'm willing to travel if necessary. My 4yr old son wants to be an actor. He loves watching shows like Sesame St., everything on Sprout, Nick Jr., cartoon network, and all kinds of movies. He loves to re-enact little skits from shows' he seen, dances and sing songs. Even commercials enlighten him. Any think a kid does on T.V., he will do it too.