St Albans AC offer club championships for all age groups in September and we will endeavour to time and measure over the summer however if your children would like to take part in a friendly competition Watford Harriers have a competition for Minors on their website. See link:
10am to 1pm, events for school years 1 to 7.
We haven't been involved in it so can not recommend or discourage but it may be worth a try!!