the most challenging thing was i experience because  i was doing young engineers and we had to make a thing that how can we help people doing there own stuff and our one was to make people food or get them get some food from the super market or he could go and ask his next door neighbour or he cold ask him on google sheets or he cold come  and ask him wants and he will get happy but some times there food goes quickly so then sometimes there is a problem or you could just get them lots of food.