Algodoo

I tried to make this realistic by adding a lot of friction to make it rubber-like. It also squishes when you run it over with a car.

The file is a mini-scene with a car and a few other things. The car, a Fiat, is made by roman, NOT me. It's just the example I use in my scenes for car-related stuff.

You can select a cone and save it as a phunlet. Use it anywhere, just give me credit.
Have fun!