For the pen and mechanical pencils, cheap, simple brands like Bic will work well.
Remove the cap from the pen, then unscrew the part of the pen that holds the ink from the outer plastic tube. {“smallUrl”:“https://www. wikihow. com/images/thumb/0/00/Make-a-BB-Gun-with-a-Mechanical-Pencil-Step-2Bullet1. jpg/v4-460px-Make-a-BB-Gun-with-a-Mechanical-Pencil-Step-2Bullet1. jpg”,“bigUrl”:"/images/thumb/0/00/Make-a-BB-Gun-with-a-Mechanical-Pencil-Step-2Bullet1. jpg/aid35503-v4-728px-Make-a-BB-Gun-with-a-Mechanical-Pencil-Step-2Bullet1. jpg",“smallWidth”:460,“smallHeight”:306,“bigWidth”:728,“bigHeight”:485,“licensing”:"<div class="mw-parser-output">License: <a target="_blank" rel="nofollow noreferrer noopener" class="external text" href="https://creativecommons. org/licenses/by-nc-sa/2. 5/">Creative Commons</a>
\n</p><br />\n</p></div>"} After you have done this, cut the closed end of the outer plastic tube so that you have a single tube with holes at both ends....