maybe. my wife hated Up though.
Tell me that you at least liked Toy Story 2 & 3? Those two, Ratatouie, and Over the Hedge, are my favorite kids movies
The Incredibles is my absolute favorite kids movie, but it's pretty dark for kids under 10 or so. Other favorite non-Disney/Pixar kids movies include The Princess Bride, Spirited Away, and recently How to Train Your Dragon.
Tons of good kids movies out there though!