Good Idea: DIY - Ice Packs using Liquid Soap. Save money on buying ice packs by taking dish soap, pour it into a ziploc bag, then freeze it. The soap doesn't solidify so it molds to the shape you need, it gets colder and stays colder longer.
Color Code Your Keys. Could be a quick an easy craft on the days we need something quick -- could have people know before hand to bring their keys if they wanted. but then again people might not want to color code their keys?