There’s a word for what your parents send home with you
Parentphernalia is the clutter your parents send home with you after you've moved out. The Urban Dictionary definition gets very specific: health gizmos, junk mail, flashlights, and written instructions for doing something simple.
The instructions are a particularly good detail.
Urban Dictionary of Family collects entries like this, with the contributors’ names alongside them. Some describe affection. Others describe the arrangements that come with it.
A boomerang kid moves out, then moves back in. Boomerang Money buys someone a present with their own money. The example involves Christmas gifts for parents, charged to a card the parents pay for.
These are small things to have names for. They're also the details that make a book about family feel familiar.