To make her text-of-tacks, Jessica simply wrote on the wall and started to push the pins. One thousand pins in all. A very cool and easy project, but if you'd rather not have one thousand tiny holes in your wall, check out this project that was inspired by it:
Its maker used a frame purchased at Michael's, took out the glass and inserted black foam board into which she pushed the pins. Easy-peasy, but for more details, click here.
Push Pin Art [Metal and Mud]