If you're looking for a novel and cheap outdoor Christmas decoration, these tomato-cage-turned-Christmas-tree decorations are inexpensive and fun.
You'll need some 3-tier wire tomato cages, black electrical tape, 100-bulb strands of mini lights, and some monofilament line to hang them. The basic design is simply wire wrapped around the inverted tomato cage to create a glowing Christmas tree shape. The hanging requires a little finesse with the monofilament line, but you can read more about that at the link below.
Have a crafty and inexpensive holiday decoration to share? Let's hear about it in the comments.
Outdoor Lighting: Hanging Trees [Martha Stewart]