p.s. this is my 1st instructable
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Signing UpStep 1Materials that i used
2. hollowed-out pen
3. krazy glue and tape (glue isnt needed, but it helps)
4. razor or scissors
5. clothing pin
6.dental flosser (not floss itself, but the handled flosser)
Ok, so the last 2 arent "office supplies", but they still are common household items, and you can always improvise.
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http://www.instructables.com/id/office-supply-crossbow-trigger-w-safety/