The Russian Santa was energetically performing and running around with the kids. All of a sudden he stopped and fall down.
The kids were confused as they ran toward him. They can be heard giggling as they think his tragic collapse is part of the festive game.
But the actor playing Santa, named as Valery Titenko had tragically suffered a sudden and fatal heart attack.
Another cast member, a woman dressed as a clown, is seen rushing behind the tree to help the stricken 67-year-old.
As kindergarten staff confronted the young students, he was rushed to hospital in Kemerovo but died on the way, said a medical source.
Valery Titenko was a well known actor in Moscow. It was revealed today that he had not been feeling well, and had complained of chest pains, but did not want to let the children down so came to perform for them.