What is something you would recommend learning in a day?
brianto2010: Origami! It's always fun and there are a ton of resources/guides/tutorials online. Most projects are usually short and practically all are doable in a day. Plus, many projects are cool to show off. Some are even useful! Here's a favorite of mine (simple, takes a couple minutes):http://www.ehow.com/how_4563591_origami-bookmark.htmlHowever, don't go overboard with the paper :-)