Want to grow your own food but don't have a plot of land? The Windowfarms Project makes kits for modular, hydroponic "farms" that hang in your window.
The Windowfarms use repurposed plastic bottles (you supply these) along with a pump and irrigation system that circulates nutrient-laden water to your plants. They can be used to grow tomatoes, snow peas, lettuces, and many other vegetables.
The Windowfarms Project just released new home kits for the holidays. Prices run from $140 to $240. That may seem like a lot, but a Windowfarm will cut down on your grocery bill and provide you with your own fresh herbs and vegetables year-round.