DH is taking DD#1 (almost 2.5) shopping this weekend to "buy" a Christmas present for her little sister, who is 7 months old.

As a second little girl so close in age, she's got plenty of everything and doesn't NEED anything, but I like the idea of starting the tradition of the girls shopping for each other...any suggestions as to what my husband could steer DD#1 towards, since I have a feeling she'll just shop for herself?

For reference, DD#2 is buying DD#1 a set for her dolls that includes a carseat, feeding chair, etc. Other "big" gifts DD#2 is getting are the fisher price little people zoo (from Santa) and a vtech walker (from Grandma & Grandpa).

I was thinking maybe her own baby doll so they can "play" together, but no other great ideas.