I hate those things, too. I hate the way you're just driving to work, and some sandcastle cuts you off with inches to spare. Then they hit their brakes--because you are too close to them.
'Intelligent and friendly' my African behind. If sandcastles were so smart, how come they voted to re-elect Bush?
Is it just me, or does it look like there's some sand on the kid's mouth. That would explain why he has a fistful of sand: he's eating it. That would also explain the expression.