There is a pretty simple way to make a trap-like mine out of innertubes, PVC, ballons, and a few assorted items. It may already be posted here but
1.you take the PVC pipe perferabley* 40 gauge and drill a hole near the bottom this should be about a half an inch.
2.Take your balllon (the kind you tie into animals) and run it through the pipe. The pull the open end through the hole.
3.Then take the innertube and place inside the pipe as well but behind the ballon.
4.Fill the ballon with your favorite paint color so its about the thickness of a hotdog. Yes this is a mighty task but you'll figure it out.
5.Now plug it, tightly, with a piece of cork with an eyelet screwed into the end. Fill the innertube just enough so that it puts pressure on the ballon. Tie some fishing line, wire, or anything eles you got to the eyelet and rig it up. This can be done by straping or tieing it to a tree then run your string whatever length away. Tie it to a tree or anything eles avaliable.