Put a dab of peanutbutter in the bottom of a jar or drinking glass.Turn the jar upside down and prop it up on a nickel.
A penny isn't big enough and the mouse will knock the glass over before getting under it.
A nickel is the right coin to use.
Do this somewhere mice can get to.
In the morning if you're lucky you'll find something like this.
A mouse crawled under the edge of the glass to get to the peanut butter.
Then it knocked the glass off the coin while jumping at the peanut butter.
You've caught a mouse!
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