At this point, Oliver and Natalie don't really play together. First of all, Natalie doesn't really play. Second, she is just learning to tolerate Oliver's in your face approach. Up till now, Natalie would be happy going off to a corner of the house, sitting down, and just stimming. But she is beginning to blossom and you can see it by the way she is interacting with all of us more.
When the two of them fell asleep lying next to each while watching Little Bear, it really was the sweetest sight.