Well... I've always been a plant killer... not intentional... but I keep forgetting to put water in plants... Oops!! :P
I guess there must be lots of people like me in this world, so USB Powered Mini Greenhouse is invented...
The USB Powered Mini Greenhouse features an adjustable growth light and an easy view window that offers maximum plant protection. It comes with a computer interface that monitors growth rate, and includes calendar, wallpaper and bookmark settings so you can take care and grow your own desktop plants. In the starter pack, Marigold seeds and artificial soil are included as well.
You can buy one at Geek.com for US $19.99. This is a nice price. Unfortunately, shipping cost kills the deal. :(