H.M.
We found a really cute tiger chair that we got for my oldest that was in my room waiting for him when he came to see us. He was so excited when he found out it was his and he got to take it home. Once home it stayed in our room. Since the baby had all his stuff in our room we wanted him to have something that was his own. Or get them a shirt or stuffed animal that says big brother/sister. I think its great you want to have something for them!!
Good luck and God Bless!