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You’ve been granted magical engineering skills, but you can only use them to build one gadget or machine. What do you build?

We love having a big yard — almost an acre. My husband is a master gardener and he grows lots of things — flowers, fruits, vegetables, and, of course, grass. Picking fresh tomatoes and bright green peppers is great; cutting off the fresh spears of asparagus and small zucchini is satisfying. The really onerous task in the summer is cutting the lawn, going up the hill and down, along the lines of the grape vines, under and through the trees, and as close as we can get to the flower beds.

A robotic law mower would be wonderful to have. It could mow the grass on its own, following a program that had been downloaded to it. It would know the configuration of the yard because, like a GPS, it would know where everything is located. It would be able to change speed to go up the mild hills, as well as the ability to decelerate when going downhill.

Think of it — no more sweat, no more aching legs, no more green shoes, no more fresh-cut grass making me sneeze. What a wonderful invention it would be.