Make your own mouse trap using a paper towel tube, a plastic container and some peanut butter.
Place a dab of peanut butter inside the very end of an empty paper towel tube. Place the tube against the edge of a Tupperware (or similar) tub such that the peanut buttered end is hanging over the edge of the tub. Since mice love tubes, they will investigate and find the peanut butter. When a mouse reaches the end of the tube to get the peanut butter, their weight will cause both them and the tube to fall into the tub, where he will be unharmed but unable to escape.