Rope joke for kids

A rope walked into a restaurant and ordered a milkshake.

The waiter said "Are you a rope?"

The rope said "Yes."

The waiter said "We don't serve ropes."

So, the rope went out and burnt off his ends and tied himself into a knot. The rope went back into the restaurant and ordered a milkshake.

The waiter asked "Are you a rope?".

The rope said "No, I'm a frayed knot."