Gladys,
Does your little guy like fast cars, Disney Junior and Frozen? Disney's Hollywood Studios could be the perfect park for you!
Lights, Motors, Action! Extreme Stunt Show is a stunning display of fast moving cars (including a cameo of Lightning McQueen), incredible stunts and some movie magic! Chase scenes, some fire effects and the secrets behind some tricks are all a part of this show. If your little guy has sensitive ears, I'd recommend some hearing protection if he will wear it (the headphone style protection works great), as the show gets really loud with all those engines revving!
Disney Junior-Live on Stage is my four-year-old daughter's favorite experience at Disney's Hollywood Studios. She sings along and especially loves the special effects that fall from the ceiling in tune with the different scenes from the show.
Finally, your son just might enjoy
For the First Time in Forever: A Frozen Sing-Along Celebration (heck, you might love it also). Video screens throughout the theater show clips from the movie and have the words up on the screen (including bouncing snowflake) so you can sing along! The additional Cast Members helping tell Anna and Elsa's story are a riot and my kids really enjoyed the show.
Gladys, I hope this helps you out. Please come back and visit us here at the Disney Parks Moms Panel with all your vacation planning questions.
Best Wishes,
Amy B.