Have her sit down with you and make a list of activities she likes to do (draw, play dolls, play blocks etc).
Then put this list somewhere she can reference. Every time she comes to you tell her to go choose of her list. Put the ownership on her to choose what she does.
After a bit when she comes to you interrupt before she speaks...hand up in stop motion and say reference your list.
She is old enough to self entertain for long periods of time. She just wasn't taught how and unfortunately it gets harder the older they get to teach them how to play.
It is such an important skill to have!