lego felt tip printer marker
A lot of today's brightest nerds grew up playing with Legos before they moved on to programming computers, so it's not too surprising that someone has built and programmed a working printer using just Legos and a felt-tip pen. The technical prowess that went into creating this device is amazing, although most people will probably be more impressed by the cute Lego workers attached to the main printer body than by the fact that the creator wrote his own printer drivers from scratch.

Some haters in the YouTube comments have suggested that the printer's creator used a pre-packaged kit. Well, haters gonna hate, but he actually constructed the entire thing from his own design. It goes through pens at a rapid rate and it can only print one page a minute, but this "Lego Felt Tip 110" is way more fun than any printer you can buy in a store.