My oldest daughter just had her 7th birthday. On birthdays we usually try to get something small for the daughter who is not having a birthday so she doesn't feel left out. This year we bought each of them a Disney Fairy Doll.
It turns out they would fight over who gets a certain doll. So our oldest daughter took some of her birthday money and bought the doll her sister wanted so that they would not fight over the dolls.
I was so proud of her for being willing to buy her sister a doll she wanted instead of buying something for herself.
It's so nice to see one of your children make a decision out of generosity and not out of selfishness.