What do people have to send to the organisation in order to arrange their own Parkrun event? 5 How must children complete a Parkrun event for their time to be officially recorded? 6 What is the minimum age for children to take part in a five-kilometre run on their own? What do people need to take on the day of their run? Give two details. [What do people have to send to the organisation in order to arrange their own parkrun event?​