Buy lunch?I use to take my peanutbutter/jelly sandwich and piece of cake wrapped up in newspaper,tied with string, when I was a kid in school-1940.Kids are spoiled now.
However,your kid has the right terminology and appears to be on the right track for great adventures with you.
Most times he doesnt even realize he's being funny- He may start to like it soon. The 6 year old girl is out of control with the pinpointer and have to keep her in check!