Jonathans' Papercrafts
Papercrafting is kind of like American origami but much cooler. You're mainly just making elaborat paper models of things. There are many different models out there, so make what you like. Here are some papercrafts that interest me.
Mario's Kart
This is a model of Mario's kart from Mario Kart DS. I've made this and I think it's a pretty cool thing to have if you're into Mario Kart. Note that this picture is a prototype and the real model will be red and have the Mario "M" logo on the front.
You can also get Wario's and Luigi's Kart at www.nintendopapercraft.com
 Young Link
This is a model of Link from Majoras Mask on the Nintendo 64. If you are a Zelda fan this is the thing for you. I've made this and I like the way it turns out. You can get this and other Zelda papercrafts at www.ninjatoes.com
Anakins Jedi Star Fighter
This is a rather complicated model so it might take you some time to make. I request this for the more advanced builders. If you like Star Wars this would make a nice addition to your Star Wars collection. This model comes with a stand that you have to build. I haven't made this yet so I don't know how hard this really is. You can download this and other cool stuff at www.paperkraft.net
Sam Flynns Identity Disk
As most of you probably know, there's a remake of Tron out in the movies. This is a good model if you like the new Tron. I think this might be a life size model of the disk which makes it all the better. This is a easy build but it might take some time to make. When you're all done you might be tempted to throw it around and derezz people! I found this model while searching on google, so I can't provide the exact site name. Sorry.
Papercrafts
 If you like this kind of stuff try...
-nintendopapercraft.com
-ninjatoes.com
-paperkraft.net
-PaperCraft Museum