YWH Challenge-pebble

I sat on the boardwalk splashing and swishing my feet around in the calm water. I was surrounded by pure, peaceful scenery. Suddenly, a boy appeared in silence. He winked and carried on on what he was doing. The unusual boy picked up a slate pebble and skidded it across the sea. Beautiful. I've always wanted to do that but I never could. And I never will. I knew that pebble had something special inside it as it was as beautiful and unique than the rest. However, may that pebble still be placed in that sea.