Build-On Brick Executive Pen
Customize your pen using LEGOs no less with the Build-On Brick Executive Pen. Made of chrome-finished plastic, this pen features single rows of alternating male and female nubs on each side and on top that just so happen to interlock with bricks by LEGO, Mega Bloks, PixelBlocks, KRE-O and K’NEX Bricks, so go crazy, regardless of how uncomfortable to write with it may become. And thanks to its design it’s also easier to integrate into Mindstorms robots with writing capabilities. The kit also includes 36 bricks in case you’re without any yourself.
Find it at ThinkGeek – $20