Animasher animations can be created in 7 languages so it lends itself immediately to getting your students to practice their skills in Italian or Portuguese.
Some of the examples are a little silly but you also have the ability to clone an existing animation and improve on it. You can also embed your animation into your class wiki or blog. Very few other websites offer this type of thing. It appears overly simplistic but it actually allows for complex concepts and effects. It makes an instant cartoonist out of even the most computer illiterate.