Percy Jackson's kids go to the past

This is a Percy Jackson story that I made up I do not own any of the original characters. I just own the ones I made up. The story is about Percy's kids going to the past and meeting there past parents.

By the way the person who I got the original characters from was Rick Riordan the books I got the characters from were "Percy Jackson and the Olympians" and "The Heroes of Olympus"

I would read the two books by Rick Riodan first because he is awesome at it, for no spoilers, and to understand some of the things in the story.