
When I was a kid, every year my parents and I (mostly my parents) would give her a mouse-themed ornament, and up on the mouse tree it went. Finding these ornaments became a little more difficult after Hallmark stopped its annual mouse-ornament series sometime in the mid-90s, but thankfully ornaments featuring adorable rodents didn't go out of style, and some gift store would always deliver.
Mouse ornaments often fall into one of two categories.
1. Mouse has shenanigans with delicious food:

2. Mouse uses human items for strange purposes; said items appear comically large:

I inherited the tree and all its ornaments after my grandma died in August 2006. They were in her attic in a box with a Post-it that said "For Katie" on it. My parents still try to get me a new ornament for it every year, but it's become increasingly hard. Last year the best my dad could find was a mouse holding a giant (comparatively, anyway) key that said, "New Home 2006," a sentiment that had no relevance to our lives. That's OK, though. The tree's running out of room, and I like the old ones.

