Waiting for his spot on Letterman

This is the joke The Bandit made up at dinner.

What’s red and purple and red and purple and red and purple?

Give up?

A lion running through a blueberry bush.

Hilarity ensued.

So much hilarity that his father and I were cracking up just at how much the boy amused himself.  Of course, the joke doesn’t make any sense, but I defy you not to laugh if you picture my five year old jiggling in his chair, snorting away in glee.