The Electric Riding Lawnmower

If you don't want to leave all the fun of trimming the grass to your solar/electric robotic lawnmower, then this is really the way to go.

It runs on a rechargeable lithium-phosphate battery, comes with an LCD display that measures obstacle proximity and speed, is constructed entirely of recycled materials and even has a cool name, The Panthera Leo.

If only I had a lawn...