How do you explain religion to a 2 year old?

Ok, so i am Jewish and my husband is not. Religion is important to both of us, well, beleiving in G-d...anyway, our son is Jewish bec i am. we are going to raise him to be a good person and his religion will be of the Jewish faith. Now it is approaching Chanukah and Christmas. He will be getting gifts all around, from both grandparents. But how do i introduce him to the fact that Chanukah will really be HIS religion and Christmas, etc will be daddy;s but he will still get gifts?? My husband doesnt have a problem with us raising our son Jewish. He will be going to Hebrew school, etc. any suggestions??