S1's picture of the bird where he was experimenting with perspective won first prize in the 5-8 age group at the county fair:
The result gave each kid an argument for how they'd beat out the other. S1 said that since he got a first, he did better. But S2 countered that she got more prize money than him ($18 to his $10), so there!
Fortunately (for us), we didn't have to adjudicate. Outside the exhibits area, there were a bunch of rides and the kids forgot their argument and went on the rides.