K has been increasingly alert and will stare at her hanging bar, things on the activity mat, the TV, the wall..

I'm wondering if we should rotate and change up the hanging toys she looks at so they're not always the same thing. Also, what other kind of toys do you suggest for little ones to stare at? Obviously at 6 weeks, she's not "playing" with anything yet. But she seems to like looking at stuff and the rattle we have. Suggestions? Do you change out hanging toys regularly for their interest?