Outfitted by Tom’s Hardware, this solar powered Nintendo DS is pretty smart, if not a tad bulky. For the most part, solar technology has a ways to go before it’s entirely practical for everyday use. We’re not sure how many people are going to carry around an extra attachment as big as the DS, when two selling points for the system are its portability and the fact that its battery charger is tiny and keeps the DS juiced for hours.

On the upside, the solar cells produce enough energy to run the DS without its battery, meaning that all you need to enjoy Mario Kart is the system, the game, and access to Earth’s yellow sun.