Thanks for all the replies - I think the easiest solution is to set up some sort of a xxx.co.uk account through my son and use that as the driver for purchases etc. Funnily enough, my son set up the initial account with his credit details, I edited that to hubby's credit card details, and we've been able to purchase books, but not music! Now, I'm kind of cross with myself that I fell for an Amazon Flash sale on the Kindle Fire - cos the Cloud storage is very limited, both for books and music, and the memory storage is only 8GB - also, the battery only has 8 hours life! I suppose it will be an Xmas present to remember!