What little editing I've done, I've used the basic movie editor that comes with Windows, which I think is the same as what Grunt's talking about. It's pretty easy to understand and has some fun features.
But if you go to Best Buy these days and go to their general software aisle, they have a lot of stuff that's pretty cheap and can do both photo and video stuff, if you happen to be a photography guru as well. Not free, but two birds with one stone.