The biggest takeaway from this chapter is the O.W.L. strategy, which encourages us all to get at a child's eye-level then stay quiet while we Observe what they're doing and say a word that matches that. Then we Wait for about 10 seconds to see how the child will respond and Listen with our eyes as well as our ears to then repeat the process. 

The first time I read this I found that I was a "Tester" and was shocked to learn how that can get in the way of a child's communication. It took me a while to get to the "Tuned-In" role that I'm at today, though I still slip back into a "Tester" on some days. 

I love pages 29-31 since they give a lot of ideas of ways to wait. 

Here's a video that goes over chapter 2.