A fun, small project from Spring ’13 was the bike-rack I built with Gabby Waldman-Fried and David Pudlo. In Olin’s dorms, we are not allowed to attach things to the walls using any method other than thumbtacks. Our goal was to make a rack that lets you hang your bike on the wall, but only attaches to the wall using thumbtacks. We tried several designs and developed one that works really well! We initially attached it to the wall with 40 thumbtacks, then removed them one by one. We were surprised and happy to find that this bike rack works reliably with only 4 thumbtacks holding it up!