My almost 4 year old nephew C recently told me he was frustrated getting to his "work-office" b/c his family had just moved and there were too many boxes. I asked his mom more about it later and she said it's quite serious business. In the morning he and his little brother C will pack up a lunch and then kiss her good-bye. C will tell her that he's really sorry he has to leave her, but he has to go to his work-office b/c that's how we get food to eat. Then both C and C go into another room to do their "work."
I think it is adorable and love such a good work ethic in someone so young. I asked his mom what I should get him for his birthday and she thought a calculator and a new notebook would be perfect for his work. Apparently the notebook he already has is all filled up with his pictures and doodles and work.