Pokemon cards (Ashton-U-Lyne OL7)

Does anybody have any old unwanted pokemon cards, the condition and age doesn't matter as its for a wall art project with my young neice. For reassurance aswell i will happily sit and try to value each card so that if any are worth a good amount of money i will be honest and hand them back as i dont want to appear to be ripping anyone off, im not a collector so i have no interest in monetary value, we just want to create a big family tree style design across a full wall. Any other pokemon pics or toys would also be gratefully accepted and somehow added to the project