I have bought DD1 an electric guitar with amp for christmas, and it has turned out to be much cheaper than I imagined. I thought the guitar would be about £100 and the amp £40, so I told grandparents that I could buy the amp on their behalf and that could be her present from them. However, the whole set only cost £70, so what would you suggest I do with the surplus? I couldn't take £20 each from them and only pay £30 from me (it wouldn't feel right) but I can't now tell them it was cheap, because, knowing them, they would then feel obliged to dash out and get something after all (when they thought they had her present sorted already) Any suggestions gratefully received!