Hi Rosie,
Good point! One of the simplest and most effective inventions in the world is the speed bump. It is non-mechanical, just lays there, yet does it job over and over and over. No telling how much money has been spent fixing damage that has been caused by people going to fast over speed bumps. This is something that students need to learn. The bumps are there so they need to slow down and go slowly over them and not let the bumps "derail" their education in the process.
Gary
