What our son did on his holiday

Our son has has a few friends to stay over the school holidays and I think its my duty to offer each visitor an experience of 'farm life'  (or we could just call it slave labour).  I asked the boys if they would help with something and only as we got to the patch did I mentioned that I'd just unloaded a trailer full of horse manure into the 4th patch and I'd wanted them to spread it around.  To their credit they did it but I can't say they enjoyed it.