I-spy-with-my-little-eye是什么游戏？

I spy with my little eye is an American game that children love to play, but what exactly is it? It's simply a guessing game, usually played when adults (like in cars) and kids interact together. One person secretly picks an object and says the first letter of the word, such as "W," then others try to guess until they find the right answer. In essence, it's another form of a guessing game.