I am a circle,
round and round, 
yes, I am,
round and round.
                                    I am a square,
                           with four equal sides,
                           yes, I am,
                           with four equal sides.
I am a triangle,
with three sides,
yes, I am,
with three sides.
                            I am a rectangle,
                            with four sides,
                            yes, I am,
                            with four sides.