The best way to save money on Christmas shopping is to give your loved ones homemade gifts. The presents you make don't have to be the traditional cookies or knitted scarves; there are plenty of ways to be creative and thoughtful on a budget. One of my favorite gifts this season is the terrarium, which is basically a plant arrangement set in a glass or plastic container. It's a simple yet meaningful gift — the recipient can use it as her office greenery and watch the arrangement grow. Not only is it beautiful, but each one will only cost you about $5 to make! Read on for instructions.