What dvd is best for learning the alphabet?

My very hyper son is 3 and he knows some of his alphabet song. But yet doesn't know them on paper. I need a dvd for him to watch that will teach him his abc's and also be fun for him to watch. He will only sit and actually watch if its entertaining. He has a laptop and can sit for hours playing but he has gotten used to just looking for the exact letter and not trying to figure out what the letter sounds like or really looks like. Its a game to him and only a game. Please help! Lol I want him to think kindergarten is boring by the time he is old enough to go. Thanks!