Punny (mid-long, kid friendly)

A string. Yes, a string. A string takes a seat at a bar and orders. Bartender: you a string? String: …yeah… Bartender: we don’t serve strings here Defeated, the string leaves. Outside, he peels back some of his ends and twists the fragments around and through one-another. He goes back. Has a seat… Bartender: we don’t serve strings here, ARE YOU A STRING?!? String: I’m a frayed knot.