This is a trap which can be set off by a trip wire or by pulling on a string. It is rather simple and easy to make. When set off it will shoot lots of spacers in a direction.
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Step 1: Construction
Follow the images:
Image 1: Make 1.
Image 2: Make this.
Image 3: Add 2 yellow rods as shown.
Image 4: Add 6 silver spacers to each yellow rod.
Image 5: Add a red (well, gray in the image) connector.
Image 6: Make one of these.
Image 7: And one of these. There are 3 layers of the thing. (Spacer pusher)
Image 8: Put them together as shown. The rods of the main part go through the holes in the connectors.
Image 9: Make this. (Pin)
Image 10: Attach string to the gray connector as shown.
Images 11-12: Put the parts together as shown. It can be put together in either of the positions
depending on how you are going to use it.
Step 2: Use
Attach a rubberband around the spacer pusher and the ending as shown and use the pin to keep it in place back. Get the string through the holes in the connectors as shown. Then place spacers on the red rods. Place the trap where you want (you may want to tape it down) and attach the string somewhere where it would be pulled. If something snags the string it will pull the pin out and it will shoot spacers.
Warning- This may cause harm or injury if misused. I am not responsible for damage, injury, or death caused by this instructable