how can i describe to a 9yr old kid about the relationship with god/torah.

In one slide of a power point presentation that can only consist of approximately 5lines and five words per bulleted item without having the child confused and not understand me.

And then in another slide:
I have to describe:
The history of key sacred texts
also five lines and 5 words per bullet.

This site has a very simple explanation of Jews' relationship to God and the Torah. I suggest you take five of the 13 points that seem most important to you.

http://www.mechon-mamre.org/jewfaq/beliefs.htm

For the sacred text, you might just want to show the history of the Torah.

Most important book to Jews

Torah consists of five books:

Genesis, Exodus, Leviticus, Numbers, Deuteronomy

Given by God to Moses

Oral tradition; later written in Hebrew