My LO is nearly 2.5. She can play completely independently for maybe 5 minutes at a time before getting distracted and going to something new or wanting to see what I'm up to if I'm in another room.

The only thing that keeps her still longer than that is a tv show.

She is usually okay to entertain herself for extended periods of time (30 minutes+) but she goes from activity to activity.

How old is your LO and how long can they actively focus on one activity?