I tried to give examples here. People bring presents for the older child when they bring presents for the baby. Actually I do not recommend this so let me explain. I think you should be fair with your children and if you take one out for ice-cream you take them both. But there are times when you do for one and not the other.
Birthday parties are a good example.
If you have a party for one you typically don't give presents to all the children. And if one child has outgrown their shoes, you buy a pair for that child and not the other. So there are times when we do for one and not the other. At these times you should teach the child how to get enjoyment out of giving and how you get pleasure out of seeing some one else get something. It makes me happy to make others happy.