But look at it from a small kid's perspective - you're into bright, hyperactive movies and modern toys, what are you going to be more excited about, a simple bubble writing sign or a mega awesome sign with rings whizzing round it like an atom and words that come out of the page at you?
I've not been to paulton's so I don't know exactly which average age group it is aimed at, but if their audience is above the age of about 7, I think the new logo is more suitable.