My son recently had a birthday, and we had quite a few people over to celebrate.  He told everyone thank you without being asked to.
We recently celebrated my son's birthday, and had a big party.
user
oh yeah that must have been a good time
assistant
It was! He got a lot of cool toys, and ate a bunch of ice cream.
user
Those are the best times when they still like to play with toy's mine lost interest years ago and I miss it
assistant
As he opened gifts, he told people thank you, and told them thanks for coming when they left.  I was pretty proud of our 4 year-old.
user