The maximum surgical tubing length is 2ft. Also, the distance is recorded by where the egg first lands, which is why it doesn't matter if it bounces and rolls further, or cracks.
A bit early for a culminating.. but here we are at the much overused "Build an Egg Launcher" project. The idea is to use surgical tubing (2ft) to launch an egg the farthest possible (the egg can crack, it doesn't matter). The only force allowed in this is the elastic force of the surgical tubing...