Christmas Comes But Once a Year: The children at the orphanage are thrilled to wake up and find plenty of new toys on Christmas morning. Unfortunately, all of them break or fall apart within a few seconds. Prof. Grampy, the inventor, passes by in his motorized sled and hears the wailing of the disappointed orphans, which brings him to the door to investigate. When he learns what is wrong, he puts on his thinking cap and quickly comes up with a plan to make everything all right. He sneaks into the kitchen through the window, takes out every pot, pan, plate, spoon, etc., and builds better toys than the kids could have dreamed of.