Balls. Small enough where she can hold them, but not small enough where she can put them into her mouth. I would suggest plastic as well and not foam, as she'll chew on them. Then when they squirm away from her it'll teach her to roll over and eventually crawl after them. They have balls with little toys inside, glitter, etc. So that'll keep her attention if the plain ones don't.
You could also get her a bunch of teething toys. They have a great selection at Walmart.
Something that plays music is usually a good idea, or interacts with the child in some way. A toy to help teach her to sit up is a good idea. Maybe one where she can put a ball in and it comes out the other end. A toy that allows her to use her body and interact with it is a great idea. The more you encourage them to use their bodies and mind the better!
at 9:18 PM on Oct. 20, 2010