Answer:
There was a green house. Inside the green house there was a white house. Inside the white house there was a red house. Inside the red house there were lots of babies. What is it?
I am heavy forward but backward I am not. What am I?
I am an odd number. Take away a letter and I become even. What number am I?
I go up and down at the same time. Up towards to sky and down towards the ground. What am I?
I am always around you but often forgotten. I am pure and clean most time but occasionally rotten.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.