The River 2

I wrote this kind of "horror story" just for fun, and I never thought about posting it, but now I want to try. Hope you'll like it even tho it's just for fun.
The main characters are the explorers Amy, Stacey, Jake, James and the new friend Charlie. They live near a river, and they always thought it was boring, until they started seeing strange things in there, so they begin to explore the area and they find some dangerous monsters. What are their intentions? Why is the river so important?
And Amy and Stacey's mom? Why does she care so much about this river? You'll find out!