If you'd rather spend your weekend in your workshop building than out in the yard doing chores (and who could blame you?), we've found your ideal project — the Seedbot ($Free). With a pro membership to Instructables ($40 for two years), you can download detailed PDF instructions to build your very own grass-seed-spreading robot. Then all you need to do is purchase the necessary materials and start making. While the tech is definitely still in the developmental stages, who doesn't like the idea of building a robot to do our yard work for us?