Well I'm not sure I'd rank Ralph Bakshi's Lord of the Rings as precisely a kid's movie, but as I think its crap anyway. Most of these others I haven't seen and I haven't seen Harry Potter yet either.

I do like Princess Bride. Which production of The Secret Garden do you mean? There seem to be two out.

You might like A Fairytale about the two girls who took pictures of fairies in England at the turn of the last century.