Answer
I take my little man to watch banger racing at wimbledon or eastbourne and he loves it. lots of old cars driven around and smashed into each other, in terms of "motor racing" it is as base as it gets!
we have
also been drag racing at santa pod, near to milton keynes and he enjoyed that also. he enjoys the noise and the power.
grass track racing is a little like banger racing and the clue is in the title. these tend to be more localised events.
hope this helps!
