July 2018
Baby sitting on floor
Give it a life orb from a sim who has recently moved on (click on orb, then select baby).
After the orb hovers briefly over its head, the baby jumps up to a hovering position face up above the floor, as if lying in a crib. Except there is no actual crib beneath it.
No other sims are able to interact with the baby at this point. I suppose it will get hungry soon.