Some Computer Nerds

HELP!  James is turning the boys into computer nerds!  Recently, he discovered a computer game where you build houses, train tracks along with the tools required to build such as pickaxes and shovels.  At first, the boys were content watching him play, but then James showed them how to do it.  This weekend we decided to just relax and hang out before our Summer schedule really picks up.  The boys spent hours playing this game.  We set a timer for 10 minute intervals and they cheerfully took turns. 

Careful, James we don't want them to become like this: