Fisher-PriceM9523 Brilliant Basics Stroll-Along Walker

will the baby stell dolls fit in the fisher price strollers?

Does this come already build, or is it in pieces?

How easy is the assembly? It's a gift we;re sending to our niece. Thanks!

is this a good choice for a 17 month old or this toy is manly for new walkers? what do you suggest for a tall baby ? She does not need a walker, I am looking for a stroller that does not tip over easily for her to play with her dolls .thanks