Looks like a swim team. People in motion leads me to think that you didn't use multiple exposures for HDR. Image seems to have a yellow hue/cast. Tighter crop removing some of the foreground would be better.
Well, I don't know a whole lot about what makes a great HDR photo -- but I do think this is very cool! And it shows a great range of light, shadows and color, so I think it's very good! I like the subject matter too It's interesting! Something about it reminds me of a cool greeting card! Great job.
Personally, I like the drop shadow effect on some shots but I think most DPCers will cut you way down for it as being gimmicky. Kind of like when the page curl thing was big a few years back.
I also think the color balance of off a bit towards too much yellow.
One or two adults trying to herd almost 25 kids... That's a three ring circus, not just a carnival :-)