And there is one:Which of the kids-the actors/actresses who played the kids was featured on all 3 I mentioned.?

To make it a little easier,here's a hint:It was one of the actresses who played one of the girls.

I know Maureen McCormick was on Bewitched at least once. It was mentioned in her book Here's The Story!

Unfortunately I haven't seen I Dream of Jeannie, so it's a wild guess.

You're absolutely right.It WAS Maureen McCormick.Oh,by the way,on "Jeopardy!"the other day,it said that she ALSO did the voice of "Chatty Cathy"(a Mattel doll from the 1960's),on commercials.I didn't even know that.