I really love the "my first year" frames. I have one for my son and I have gotten them for first year gifts as well. You can get them lots of places, just do a search for them and see what kind and style you like. You can get the from 19.99 without a frame to $50 with a frame. Mine is the real basic one with 11 oval holes for pictures birth-11months and a big oval in the middle for the 1 year picture. I got a 11x14 frame at walmart for $8 and it looks great.
This will mostly be for mom of course. I think you could find lots of cool personalized stuff for the girls, but with the frames, I think you can just do whatever toys your children liked at age 1!