If you're looking to save some money on your water bill or just play elaborately timed pranks on your family, then you should check out the Rachio 3 Smart Sprinkler Controller. It can create scheduled watering programs for your lawn, and has the ability to update them from anywhere with your smartphone. That way you can quickly activate your sprinklers from down the street if those damn kids wander onto your property again. (Much better than using a shotgun, Clint.)
Plus, the Rachio has patented Weather Intelligence technology that allows it to adjust its schedule based on the weather forecast. Normally the Rachio 3 sells for $278.99, but right now you can knock 17 percent off that price and get one for $229.99.
Unless you are Neil DeGrasse Tyson or one of his many, many android replicas, there may not be a practical purpose for owning a complete miniature model of the Solar System. But the Solar System Mini Set is so cool that we don't care. Crafted with 3D-printing technology, each of the planets interacts with the set's free AR app to provide detailed information and stunning scenery. It even includes Pluto, because planet or not, it just don't quit. Normally this fun educational set sells for $179, but right now you can get it at 27 percent off for just $129 by colliding your mouse with that link.