Saw this earlier..
[mod edit: not suitable for family forum]
Contains a few expletives, but the site used to create it is quite good, I've been tinkering with it this morning.
http://www.xtranormal.com
Basically if you can type, you can make your own movie. I've not delved into the finer options of it yet, but it's good fun, you can change the characters, accents etc and with the summer holidays on the horizon might be a fun thing for the kids to play with too.
Enjoy
