Author's Note: otoshidama is the tradition of giving money in paper envelopes to children during New Year. As they grow up, the amount of money they get increases until they stop growing. All the traditions listed here were researched.
"Sugoii! What are other traditions that we have?" "Well, there's still the kagami-mochi, or rice cakes that we use as decorations. On top of the kagami-mochi there's an orange called daidai. If you write it with different kanji, it means "over generations," representing a wish for prosperity of descendants over generations." said Sangoku. "Last last year my mother tried to get a daidai at the store but it sold out so quickly that she had to borrow one from our neighbor." "Really? Did the neighbor lend it to her?" asked Kariya. "No, she didn't - she gave one to us. Turns out her husband grows daidai oranges."
"Nice. But along with the kagami-mochi, I remember the shimekazari, or New Year's Wreath, that's usually paired with it. It's made of twine, twigs, paper strips and mikan. When I was in elementary school this was one of our crafts for New Year. I still remember how to make one." Kariya said. "Really? So can you teach us how?" asked Hikaru. "Sure, if you want to." he replied.
"Any others?" Tenma asked. "Yes. You have the tradition of drinking otoso, or as some people call it, New Year's sake. But when written in kanji it reveals a different meaning. The last kanji "蘇" is believed to be the name of a demon which used to harass villagers, and the middle kanji means to "kill" or "slaughter." When you drink otoso, families share the same three special cups. The drinking order generally starts from the youngest person of the group and ends with the oldest, whose purpose is to allow older people to absorb some vitality from the young people." Kurumada said. "So that's the reason why I have to drink first every year. Is it still used for medicinal purposes and does it have other uses?" Aoi asked. "Today it's used mostly as a tradition, but I don't think it has any other uses except that." This time it was Kurama who answered. "Ah! Now I know." said Aoi.
"No more traditions?" Tenma said. Some shook their heads and some shrugged. "Are you sure there's none?" he asked again. "Tenma, I don't think there's anymore traditions that we can give, aside from the osechi-ryori, or the New Year's breakfast which Shinsuke said, and the iwai-bashi, the chopsticks you use when eating it." Kirino said. Tenma sighed and said, "You guys really forgot this tradition, this tradition that every child looks out for?" Shindou said, "Tenma, first, we're not children anymore, and second, if we look out for it, why would we forget it?" Tenma then grinned and said, "That means you guys forgot about... otoshidama?" When they heard "otoshidama", all their pupils dilated and Tenma didn't fail to notice. And he said, "See! We're all kids, after all." while stealthily making his escape. "TENMA!" they all screamed while running after him.
Well, we're all kids, after all. :D