I'm a big believer in aggressive pricing (hence the name), but if you look at children's books, I think you'll find that $4.99 is not out of line.
Agree that they should offer some sample content, and that reflowable as well as PDF is essential.
I absolutely agree that Steve is right about getting them young. My personal feeling/fear--if we don't get them hooked on electronic reading when they're young, they'll grow up doing no kind of reading at all. It isn't a question of whether the printed paper book is dead, it's a question of whether recreational reading will survive the 21st century. (Naturally, I hope the answer is yes--we learn so much about who we are by reading the novel).
Rob Preece
Publisher,
www.BooksForABuck.com