Every once in a while Livejournal.com comes out with neat little communities. One of which I stumbled on when looking up paper crafts. It's the Kirigami community and it's chock full of great little simple paper projects that only require a printer and double sided tape. Look at past entries of Homestar Runner playsets, cut paper work of castles, and star wars easter baskets.

Papercrafting...Kirigami