Watching my cousins-once-removed in the pool

Today my cousin brought over his three daughters to play in parents' pool. As I leisurly dipped my feet into the cool waters, I overheard them playing a game. One had shouted "Now you must go online and sign up for the contest." After the six-year-old had stated the rule, the two other FOUR-year-olds immediately began play typing and then announced that they had "signed on" and were ready for the contest to begin. I almost dropped my diet coke into the pool. How in the world had computers entered into a pool game? Really? When I asked my cousin if they were "computer-inlined" at home, he merely shook his head and was also a bit suprised when I explained the game that they had invented. So, is this a bad thing or are they just "with it" when it comes to computers?