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Drill two holes about an eighth of an inch diameter on each side of the bucket about an inch below the rim so a straight metal rod / wire goes across the top of the bucket. Punch a hole in each end of a soda can so the metal rod / wire can pass through the soda can. Set it up so the soda can is centered on the rod over the center of the bucket. Put some water or antifreeze mix in the bottom of the bucket at least a few inches deep. Smear some peanut butter on the can.
Prop a two by four or such on the edge of the bucket making a ramp so the mice can climb up. Mice will jump from the board to the can. Can spins and mouse falls into bottom of bucket. You can smear a thin bit of peanut butter on the board to entice them up.

Leave the bucket empty if you want to take the mice someplace to release them.