So my LO has been sleeping in his crib for months but we have been using the Rock n Play in the mornings after my husband gets LO out of bed - before I get up. He has pretty much outgrown it... what are you doing with your little ones when they just need to sit or relax for a while? --- he is sitting but still a bit shaky.
Re: Whats after the Rock n Play?
Before DS could sit for a long time without falling, we would sit him up on the floor with the boppy around him. He loved sitting and playing with his toys that way (and still does, although now it includes crawling around the room!)
We use the Summer SuperSeat. I got it because of the tray with toys. He absoloutely LOVES the toys on it too.
https://www.summerinfant.com/Products/Play/Support-Seats/SuperSeat%C2%AE-(play).aspx
We put her in her pink exersaucer.
We also put her on a quilt to play, and we prop her with pillows behind her. But we have to watch her, because she can get stuck like a turtle.