Brother excited for baby sister

I just have to brag that my son is so excited for his baby sister to get her. At the store last night he told me that she will need an Easter Card. We have to make sure she has one. He also wants to buy her everything! Car seat, clothes, toys, ect. We have it all so he only get to buy a few clothes. He keeps practicing changing diapers and latching her into the swing, baby carrier, and bouncer by using a doll.  He's only 2 1/2 but the love he has for her is incredible. When we see a tiny one, I ask if he's ready for one and he yells yes. I keep thinking he doesn't know or understand but his comments show he gets it more than I think. Fingers crossed he still feels the same when she gets here.