What in the world do you get a 17 month old girl for Christmas? I asked my brother and SIL what they needed for her and they both said nothing. I asked them for ideas and they said whatever I want to get her. That's really helpful!
You really can't go wrong at this age. My 19 month old loves board books with different textures on the pages, water toys, toys she can push like strollers and shopping carts, and balls. This is my current favorite gift for toddlers: http://www.target.com/p/b-parum-pum-pum-drum/-/A-12026425#prodSlot=medium_1_2&term=Drum