Never tried to build one. Got 3 store bought ones. Carry them with me to the lake and when I see a bunch of minnows in shallows I bait with rolled up bread chunks about the size of marbles or mini marshmallows and set her out, Also have a creek near my house that always gets me minnows. Son uses saltine crackers and cheerios too. Be careful of turtles. They can damage your trap. Got a few nice snappers sitting by my traps. Take a stick and stick it in front of their nose, sooner or later they will bite it. Just grab them by tail and pick them up. Good eating. Steve