Its just the age unfortunantly, my 5 and 8 year old girls question everything when i ask them to help. I understand it is so tiring. I’ve started explaining why before they have the chance to ask and therefore stops the questions being thrown at me one after another

Maybe have a stock answer ready, like “it’ll help Mummy” or “it means we can do something fun when we’re finished” so you don’t have to think of an explanation for everything.