The humane rat trap I was using could not contain the small mouse that simply squeezed through the wire mesh. This bowl trap is simple and will hold any size mouse that can fit under the raised edge. The trigger piece is made from clothes hanger wire and in this case a tray added. ( skewering cheese or peanut butter eliminates the tray) I used a tray as the mouse was storing seeds in the area and I used the seeds as bait. The short end of the trigger is one inch bent 90 degrees. Use some sand paper to rough up the area in contact with the edge of the bowl. The long end of the trigger should place the bait near the middle of the bowl to prevent the bowl edge hitting the mouse. Slide cardboard under the bowl after the mouse has been captured to allow transport away from your trap site.
Here is a video of the trap working http://youtu.be/ahRjYFrQxL4