I love how you captured the water and your nephew's expression. He's clearly having a great time. I also appreciate the background: without taking attention away from the subject, the flowers further add to the summertime theme.
I took hundreds of photos of my great-nephew playing in the sprinkler. It was hard to choose one to submit here. I'll be posting other ones in a "Summer Fun" gallery at www.rickytims.smugmug.com, if anyone would like to see some of the others from this series. Big thanks to this six-year-old for providing these fun pictures!