DROPPING two eggs on to a tin lid, one surrounded by polystyrene and one not, instantly showed the children the importance of wearing a bicycle helmet.
"You have one head – look after it," warns Essex County Council road safety officer Lorna Yeadon.
The children take in a scenario of two life-size teenage dummies who have been killed cycling and walking.
They are asked to point out all the ways the 'dummy kids' have put themselves at risk and what they should have done differently.
Lorna explains: "The point we make is that no one can tell what drivers are going to do, but as a cyclist and pedestrian you can make choices about what you do. We stress that image is not important, safety is. Wearing a helmet and fluorescent clothing is cool as it can save your life.
"We would love to have longer with the children, but we pack a lot into the 15 minutes and it is just enough time to get our messages across."
Chancellor Park Primary pupil Andy Newman, 11, appreciates what he has been taught.
He said: "This gives us an idea of what could happen in real life. I think it is a real help, especially for when we start secondary school."
Classmate James Parham, 11, adds: "The message is we have control over what we do now and it is up to us. We have to take responsibility."
