Creative Writing Exercise

Here's the passage you were asked to work on to give it more "voice":

I was really excited about going. It would be the best day of the summer. We were going to go rafting.
My mother, father, brother, and sister got to go. They were excited, too. My dad knew a lot of stuff about rafting. This would be neat.
When we got to the river, it looked big. The water was moving fast. I got scared.It turned out to be fun. We ate sandwiches and drank pop. I wore a life jacket and got wet.
It was the best thing I did all summer.