My son received Lettersaurus as a gift many months ago. He loves the toy now as much as he did when he first opened it. He certainly has his favorite songs but, generally, he tends to listen to nearly every song available (of which there are 27). What is most remarkable is that he continues to return to this toy time and time again. I must say that I am a bit puzzled by some of the critical comments. Surely, touching the top if the head does invoke the ABC song. I assume this is by design since the Lettersaurus's crown is a button, and, yes, pressing it does invoke content. As for the "Exit" for X comment, perhaps this parent isn't familiar with the teaching of phonics. Exit is one of several words that precisely express the sound of the letter X. A cursory search of your friendly internet would make this clear if you hadn't already learned this on your own. I guess you can teach the children but who is going to teach the parents?
In any event, I see no decline in my son's interest in this toy and consider it one of the staples of his (considerable) collection of learning toys.