Your children look up to you and need you. You set the best example. That's why you should wear a helmet every time you bicycle, in-line skate or skateboard. Helmets are designed to withstand only one impact. If you or your child is in a crash involving the head, buy a new helmet.
Most manufacturers offer a lifetime replacement guarantee.
Check the helmet package. No helmet will protect against every impact. Look left, right, and left again before proceeding. Stop at the end of the driveway. Look left, right, and left before entering the street.