Our daughter wants to bring one Christmas tradition to both houses

My daughter is ten, and this year she wants Christmas breakfast to be the same at both homes.

Not the whole day. Not the presents. She wants cinnamon rolls from the tube and the paper crowns we made when she was little.

Her dad has a different breakfast at his house. I have kept the rolls. We alternate which home she wakes up in, and this year she will wake up with him.

She asked if I could send the crowns with her and tell him which rolls to buy. I said she could bring her own crown and that she could ask him about breakfast. Then I heard myself treating a small request like it was a negotiation over territory.

Her dad isn't against the rolls. When I mentioned it directly, he said that was fine. He just wondered whether we were now going to reproduce everything in both houses, because his family has things they enjoy too.

That is a fair question. I don't want her request to turn into a standing requirement that one household copy the other.

But she isn't asking him to become my house. She wants one familiar thing to be available when she wakes up somewhere else.

The crowns are in a grocery bag on top of our refrigerator. They aren't heirlooms. Some have names crossed out because she assigned everybody new royal titles halfway through breakfast one year. I could make another set with her. Nothing about this has to be scarce.

What catches me is the feeling that the breakfast belongs to us. Writing that down makes it sound smaller than it felt when she asked.

I want her to have room for traditions that travel and traditions that stay different. I don't want her to become the keeper of two adults' sentimental boundaries, deciding which memory she is allowed to carry where.

The practical question seems easy. The emotional one isn't. How would you handle one child's request to share a tradition across homes without making sameness the new expectation? I think I need to give her the crowns before I make my feelings about the crowns her problem.