If you don't want to make one yourself:
Lots of different ways to DIY these - just check out all the videos until you see one you like.
Thanks! So far there were two brown mice (not Field Mice) trapped in a 5-gallon bucket that was in the greenhouse for green scraps that go into the compost pile when I’m re-potting or trimming plants.
So, even without any bells and whistles, they managed to off themselves without my help. :)
More rain today - all week, really. I uncovered things in the greenhouse and no chewing on anything, so maybe this temporary crisis has passed? Hope so!
Those bucket traps work really well for Chipmunks, too. ;)