The Mysterious Tunnel - S1.E21

Mary and Randy write letters to Santa Claus and place them in the postbox. Randy waits outside the postbox expecting Santa to show up. Nick and Terry see this and tell Randy that Santa Claus does not exist. Randy talks about the days activities to Dad, and Dad explains that the feeling of giving is what Santa Claus is all about; that everybody has their own Santa Claus in their hearts. Randy sneaks out of the house dressed as Santa Claus, riding ChaCha, who is dressed up as Rudolph. They visit all their friends with gifts, but end up meeting the real Santa Claus.