A Man a Stool a Leg of Mutton and a Dog

Two legs sat upon three legs,

With one leg in his lap;

In comes four legs,

And runs away with one leg.

Up jumps two legs,

Catches up three legs,

Throws it after four legs,

And makes him bring back one leg.

Answer: One leg is a leg of mutton; two legs, a man; three legs, a stool; four legs, a dog.