I remember that i watched this movie maybe 10 years ago.It’s a family movie and I think it was on Disney channel .It was about two single parents ,they both had kids.The woman had a girl and the man had a boy.They both leave their kids in the house of an old lady which is a nanny.She turns out to be the bad guy and she tries to steal money.She locks the parents in the basement and the kids save them
Bratty Babies (2001)
https://m.imdb.com/title/tt0270549/