Sesame Street had making shapes out of people laying on the floor. So the 5 year old begins explaining to me that since we had 3 people (me, him, and his brother) we could make a triangle (which we did), but if daddy got home we could then make a square. So I showed him how to make a square using our legs, and then we also made a circle with our bodies for his brother to jump into. Then I ask him, ok now you pick a shape, what should we make? Him: A parallelogram. Me: A parallelogram? Him: Yes mommy, it is like a rectangle, but it is pushed a little to the side. Me: Ok, parallelgram it is.