Answer:
Where do you go in through one hole and come out through two holes at the same time?
I run around the city, but I never move.
What is yellow, looks like the moon and has seeds?
There are millions of me. I am very small but when moving fast I am deadly.
When the son of the water returns to the parent, it dies. What is it?
You use it between your head and your toes, the more it works the thinner it grows.