They don't always fit in the holes without some coercion, so she uses a hammer, with something between the two so as to not destroy the coin.
Today I brought home the Wyoming quarter, and she starts hammering it in, and I point out the major flaw in what she's doing.
We recently got a new table for the dining room.
Why is this important?
It is a GLASS TABLE.
Hammer plus glass...yeah. Fortunately, we got lucky, but damn if it wasn't funny.