Our little girl is almost 11 weeks old, and I just purchased this rattle for her last week (based on the reviews here). I got it at Wal-Mart. Already she's comfortable grabbing it, and can hold onto it for long periods of time with her little fingers. In the last couple days she started trying to gnaw on it.

Great (and inexpensive) toy for a very young infant to explore, and great for tiny hands. The only downside of it ... is that she bonks herself in the face with it ... a lot ... and hard! She doesn't seem to mind it yet, but I'd still supervise your child with this toy.