Are you thirsty for a new and innovative gadget? You're in for a treat this holiday with the Thirsty Light: a digital plant moisture sensor that, when left in the soil of a plant, can monitor moisture levels once per second. That means you'll never have to guess when to water your plant! And if you're anything like me, keeping a plant alive doesn't come easy.

The Thirsty Light ($9.95 each) will blink its LEDs to alert you when the soil is dry. That's when you come in and give your plant the water it needs. Place one Thirsty Light in each plant to monitor its condition, or use one for all your indoor plants by moving it from plant to plant.

The Thirsty Light is powered by two standard 1.5V AG13 lithium batteries and also comes in packs of three ($26.95), six ($47.95), and twelve ($83.95). Due to the huge success of this unique device, it's sold out until February 2008. Enter your e-mail address on the site to be notified when it comes back in stock.