Oldest son, aged about three:
"What is the nex' big thing coming up Mummy?"
Me: "Christmas, love."
Son: "What do we do at Crissmiss?"
Me: "We give people presents because it reminds us that people gave the baby Jesus presents when he was born"
"We have a big holiday because it's summer and we can go to the beach and camp and swim every day."
"We get a conifer tree and decorate it, because we copy England and Christmas is in winter there and the all the leaves are off the other trees. Conifers smell nice and look bright and green".
"We get holly and bring that inside too, and hang pieces up around the house, and put a sprig on top of the Christmas pudding."
"Um, because holly has bright red berries in winter and the red and green look nice together."
Pause. Then, very adamantly: "No. That's not why."
"No, it's because it 'members us that it's a holly - day."