My four-year-old son mispronounces some letters, I suppose it's common for kids his age – but I always get nervous that he's going to have some sort of speech problem. One that always gets me is that he pronounces L's like Y's, well tonight as we were going to bed he told me "I yove you, daddy" and I told him, for The millionth time it seems, "try licking the back of your teeth; L, L, love" and he just came out with it, "I LOVE you, daddy!" We spent the next half hour saying all the words we could think of that start with L; he was so incredibly proud of himself and I was nearly in tears.