Now think of HOW you can apply the principles to your own problem. Looking at its benefits. Click here for more methods of moving from a stimulus to an idea. But before we go on, spend a couple of minutes trying to come up with a few ideas. Much better grip in the snow.
Small stones pass straight through with a minor disturbance of the bristles.
Cleans the road as it goes. Retractable spikes in the tyre. Some toothbrushes squirt out toothpaste while you brush. They have springy handles to make sure you do not press too hard. Some have ridges so that at least some bristles get to the bottom of the dips in teeth.