I used to work in the Sesame Street area at Busch Gardens Tampa and families loved it. There's a healthy collection of things to do (mini log flume, giant treehouse/play structure, jr coaster), the lines are minimal, and kids get to have lots of character interactions. My favorite days to work were the October weekends because they put on a great Halloween event for kids where they could come dressed in their costumes, had lots of trick or treat stations set up, and put together a little dance party with the characters every hour. I wouldn't be surprised is SeaWorld did the same as it's a real hit!