I remember watching a TV show where there's a family consisting of a father, mother, elder daughter and a son. The intro of the show is like any other intro just showing them and their names and some scenes from the show like some alien/robot shoots some green stuff at him and he jumps behind the couch. I watched it between 2002-2005.
I remember only two scenarios from the show:
Where the girl becomes a mermaid, she just applies some gel on her legs and it turns her into a mermaid and then she participates in a show.
Where her brother grows up into a man in a day and he has this robot, which looks exactly like him. In one scene, the robot goes to the fridge, has a drink and it all leaks from under his shoes (that's how it was shown).
I think it was from Disney, but I'm not sure.
In the intro the show name pops out with mostly green colour with some cartoon characters on top or something (vague).
It was a real show, not reality show. I think it might have the Micky Mouse and Goofy on its name logo. Not sure.