If it were me, I'd probably just buy her a cute little outfit. I imagine at 1 she has lots of toys already including ones she now has that were once her older siblings.
Otherwise ( I was in Kmart today looking at toys with my kids) if you are near a Kmart they have things like a pink 'lullaby glow worm' for $10, a shape sorting snail for $9 (a snail thing that you put different colour shapes into, and I think it plays music too), wooden stacking blocks for $10. They have a fair bit of 'Playskool' stuff for under $15. Toys R Us also has a decent selection of things for under $15.
Edited by bakesgirls, 09 November 2012 - 12:29 AM.