This is a very simple and effective trip wire trap for use in survival situations. A noose for snaring the legs is used in this video, but a net could also be used. This trap could be scaled up or down for large or small game. At this scale, the trap could be made using two boot laces or the length contained in a standard paracord bracelet.
Traps should only be made in survival situations, and never used on people. It is likely that a trap of this nature is illegal for hunting for those within the United States. If you make this trap for practice, be sure to disassemble it after you are finished so you do not needlessly harm an animal or person.