It's true, just as it's tough to simultaneously enjoy outhouses and Japanese toilets, chances are that you won't dually appreciate both circuit boards and pens.
Still, we had to write (type, I should say) about the Circuit Board Pen. Not just some ballpoint coated in a cheap electronic veneer, the pen features a real circuit board painstakingly wrapped in an extremely thin layer of custom-lathed acrylic.
The result is a touchable circuit board pen that hopefully will not cut or poison you. And while its $US80 price may seem a tad steep, that's really pretty reasonable when viewed from the admittedly skewed niche of collectible pens. [Pens As Art Thanks Robert!]