However as any parent of a 2 almost 3 year old can tell you, their persistance in their choices of certain things seems like it's easier to let them pick the movie than to argue and make them watch something that you might enjoy better. (Which is why I horde the tv with adult shows after bed time)
Luckily I ended up being pleasantly surprised by the Rugrats Go Wild movie as it was mainly focused on the rugrats and them getting shipwrecked on the same uninhabited island that the Thornberries end up being camped out on. The two shows and the elements really seemed to flow together nicely and I thought it was very well done. The fact that it has been on so many times before and after school and that I don't completely hate it by now can attest to the fact that it was actually a movie worth watching.
Also there is a surprise appearance by Bruce Willis as Spike is finally given a voice in the third and final Rugrats movie as Eliza Thornberry is able to communicate with animals. I definitely recommend checking it out if you have kids or even if you were a Rugrats enthusiast in your youth. The movie was originally released in 2003.