Like being able to figure out the time elsewhere in the world without resorting to mental math? Or, do you travel a lot but know better than to rely on your battery-depleted smartphone? Either way, check out the world clock ($50). It’s a simple, no-frills design—but the outside has names of major world cities (like Santiago, New York, Paris, etc.) printed on it. Merely turn it one of them, and the clock will display the time in that time zone.