This just happened:
Sam is sitting on Chad's lap and Gavin started talking to him.
Gavin: "Sammy, it's not playtime, it's time to go to sleep"
Sam: laughed out loud - a real belly chuckle
It was too cute
Sam is also obsessed with the cat. He even sat on his own a bit as he was reaching out for Meatball. Meatball was not impressed with Samson continually grabbing his fur and eventually took a swipe at him. I managed to bat him away but Sam ended up with a tiny scratch. So I guess we'll be monitoring their interaction closely.