I've seen them in hardware stores, Claudia. They're just a little plastic box with one end being a falling door. Bait them, set the door and check frequently to see if the door is closed. If it is, take the trap to the release area and open the door to release. Pretty easy and you don't even have to handle the mouse.
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."