I was about 3 years old. Mom was away from the house and it was just myself and Bobby. It was lunchtime and we decided to play restaurant to make lunch. I was the boss of course.  I turned to Bobby and told him he was Fired. 

He said well ok. And turned to leave the kitchen.  I asked where he thought he was going? He had a work to do. 

He said I’m leaving, you fired me. 😂

I said of course I did. I fired you to work for me! 😂

That was the day he taught me the difference between Hired and Fired. 🥰