Basic castle protection

Our best day in Nice was spent at the beach, with the boys building a series of increasingly elaborate sand castles in cahoots with the occasional French playmate. They communicated perfectly through the universally understood needs to: 1) build fragile sand castles much too close to the waves for their own safety and then 2) to struggle mightily to protect said castles from the inevitable consequences of the poor site planning. This is clearly a metaphor that will serve them well later in life.