M.
Hi L.!
I don't have a second one yet, but a lot of my friends do-they asked the really close relatives and friends to bring a small gift for the older child if they were bringing a gift for the baby. They also asked that we greet the older child first, and make a big deal out of them being the big sister/brother (before even really taking a look at the baby.
It seemed to work well, especially when the attention continued to be given to them after they were all at home.
Good Luck and Congratulations!!
M.