My mom knows how to play.
She watched Sam from the time he was seven weeks old (when I went back to work) until the time we moved to St. Louis, shortly after he turned three.
We lived with my folks for most of the first two years of Sam's life. So, even after I'd returned home, my mom was there to play with him on nights and weekends. They are close.
When we have lived away from her, she has always visited regularly and made it possible for us to come see her. I appreciate my mom for the time she has spent with me and my son and the love and caring she showers on everyone. Thanks for coming to see us, Mom.
P.S. If you haven't seen the video of Sam knocking down the Jenga wall they built with his RoboRaptor, check it out.