In the tradition of Dr. Frog and Botanicalls comes Thirsty Light, a $10 sensor that sits in your potted plant and blinks when the soil goes dry. Now that’s something interesting and worth possessing. Place it in the pot and if the light shows up that means its time to feed the pot with water. Hey the whole sale package is worth going for – buy 12 for $84. This product is certainly going to make a mark in the eco-friendly society.