Bath toys, shoes/slippers, stuffed animal/lovey (ask if she has a favorite and give a backup one?), board books, walker toy (like a shopping cart), rag dolls.
A cousin gave my DD a clothing hamper that was personalized with her name and balloons the colors of her bedroom.
It was small (around 3' high) and had a "face" top that let her put the clothing (and many other things) into it by herself.
A savings bond would be a nice gift, too. She's too young to know who gave her what, but saving for the future is thoughtful.