I used to be so jealous of the kids who had this watch when I was younger. I mean come on. A watch that’s a calculator. How cool is that? Well, the Casio CA53W-1 Digital Watch ($19) is a reproduction based on an awesome watch that never died. Most people don’t need an entire calculator on their wrist, but this is a great choice if you do. Although it is larger than most watches, it is still small enough for comfort. The Casio CA53W-1 is water-resistant to 100 meters and offers the usual array of timers and alarms. The automatic calendar will not require updating until the year 2079.