Here in the futuristic world known as the present, robots can be used to manufacture goods. But sometimes you long for simpler times. Here’s an invention that combines the simple, old-time pleasures of a rocking chair and a knitted hat. The rocking chair harnesses the power of your rocking and puts it to good use, answering the age old question: how can we use old people for fuel?

The chair looks so simple, that I’m completely flabbergasted that it can do something as complicated (to me at least) as knitting a hat. No robots or computer chips or even electricity required.

You know, now I feel kind of silly for all the time I’ve spent knitting…

Link via Sara.