Where does the sun go at night?

*insert Picard facepalm picture*

Nowhere.

The Sun disappear for night flight to America.

The sun doesn't go anywhere. The Earth moves around the sun, and rotates on its axis, giving the illusion that the sun is moving across the sky.

The sun goes up, the sun goes down. You can;t explain that!

Behind the Earth.

It goes to sleep cause it has to get up early in the morning. If it doesn't have to get up early it stays up all night and drinks and then we have an Eclipse.

It goes home to its lovely condo in Assboink, Idaho.

Below the horizon.

My grandmother hides it in her giant purse every night. She told me so herself.

How old are you? Did you sleep through science class?