If the thought of making a traditional gingerbread house from scratch seems mind-boggling, look in your office trash bins and make an upcycled one. Use one cardboard box as the base and another box to make the roof. Cut out windows and doors with scissors or box cutters. Then decorate away with whatever office supplies you have handy: post-it notes to shingle the roof and other office supply stickers for the front. The best part? It's reusable, and kids can help decorate, too.