Level 1 in the reading/writing portion of Reading Kingdom starts with simple words and phrases such as
a kid and Here are some toys.
By Levels 4 and 5, a child is reading and writing sentences like:
One of the things in the sky is the moon. The moon does not look the same all the time.
There was a baby bullfrog. He was also very bullheaded. He liked to go to places on his own and did not stay with his mother.