I like the idea, good for kids. But you really, and I mean really need to improve on the sound quality of your voice recording. If this is to be an educational video children and student adults need to be able to hear your pronunciations clearly, currently they're far too muffled. Also the train sounds make it difficult to hear how you are pronouncing the characters. The voice goes out of sync with the characters on the second train so you don't actually pronounce the first character until the 3rd or 4th one is displayed, this could cause some serious confusion. If you can improve on these flaws I think it would be a useful little video.