I am not sure which forum to use, but I am having a "Mozart Party" in a few weeks and am looking for cartoons and such that may use one of his works as a soundtrack. Any ideas?

I don't know if these are quite what you're looking for, but maybe they will help:

There is a PBS Mozart cartoon series. Here's the interactive website with games, activities, and worksheets:
www.little-amadeus.de/index.php?lang=us

On the Classics for Kids website, you can listen to past radio programs (about 6 minutes long each) about Mozart. There is also a worksheet. (Under the "For Grownups" dropdown, you can also find lesson plans for a Mozart unit on the "Twinkle, Twinkle, Little Star" variations.) www.classicsforkids.com/shows/showview.asp?ID=27

You could look on YouTube. Here's where someone animated old paintings of Mozart: www.youtube.com/watch?v=N-Geh10ZlME

Thank you very much for the suggestions!

Great idea! Here's an old Bugs Bunny cartoon featuring the opening bars of the K545 Sonata:

http://www.youtube.com/watch?v=-fP9eTa0SG0

There's also a Simpsons episode where Bart plays Mozart and Lisa plays Salieri. Funny! But will probably need to be censored depending on your audience. ;-)

http://www.wtso.net/movie/286-The_Simpsons_1511_Margical_History_Tour.html

The Music Of Raymond Scott: Reckless Nights And Turkish Twilights

In an 18th Century Drawing Room

Scott uses Mozart's K.545 theme in the opening of this piece, but goes off into his usual musical imagination and wit. This music was used quite a bit in Warner Bros. cartoons, as well as the more recent Ren and Stimpy cartoons. Recorded in the late 30's; very FUN music! Most are ABA form with strikingly different B sections, with amusing titles. Even Stravinsky was a fan of Scott's music.