Our lovely next door neighbours have invited us to their son's tenth birthday party on Saturday. We can't make it (have another b'day party to go to and can't make both) so I'm putting a card through their door tomorrow thanking them for the invite and wishing him a happy birthday. I'd like to get him a gift -had a look for something today but am completely clueless re presents for 10 year olds. Is it inappropriate to put a tenner in the card? We're friendly with the family, but not friends with them IYSWIM- not sure if this makes a difference. It sort of feels a bit wrong but I'm not sure why. What would you think if you were the 10 yr old's parents?