Seder
Twice! The first two nights are Seders, and you read it once at each one.
You can't "make" your kid understand anything, but you can have a child's Haggadah to read to your child.
It's not a prayer. In the Haggadah, which is used for the seder, there is the story of the Exodus which we read.
It is not known for certain who authored the Haggadah.
The Haggadah contains the service for the seder.
The text of the Haggadah can be found and read at various places and in various ways online. There are websites with parts of Passover Haggadahs available for download, and the entire Haggadah can be found at Chabad Organization's website.
Moses is never directly mentioned in the Haggadah.
Eugen Verber has written: 'The Sarajevo Haggadah' -- subject(s): Haggadah, Illustrations, Jewish Illumination of books and manuscripts, Sarajevo Haggadah
haggadah
Mordekhai Elon has written: 'The Tekhelet Mordekhai Haggadah' -- subject(s): Haggadah, Judaism, Liturgy, Seder
Yes.