Materials List: Disassemble a Click Pen

Note about pens: It is best to get retractable "click" pens that twist or unscrew apart into separate barrels so the inner pieces can easily fall out, so students do not have to break the casing. One source: BIC Clear ClickTM pens for 73 cents each from Specialty Promotions Unlimited, 1-800-539-3751 or The Econo-Pen is cheaper (SM-103 ECONO-PEN).