It works! As I was cooking dinner this evening, Jonathan decided that he, too, wanted to cook. I was standing in front of the cabinet with the pots and pans that he gets to play with, so he came up behind me and politely said "excuse me, Mommy." I was preoccupied and simply moved aside to let him in, and then realized what had just happened when he followed up with "thank you, Mommy."
I've never specifically taught him to say "excuse me". He just heard us say it and copied us.
I'm so proud of him! And I'm just a little terrified to know that he watches us so well.
Lord, let me be a good example to my boys.