I know how to cheat Santa and solve our coal problem.
All the kids of the act insanely naughty and get coal for Christmas, then they can trade that coal for toys and stuff.
We get large quantities of coal, they get toys. Problem solved
Physics don't allow a sleigh to fly. It is also physically impossible for a single person to move around the world in one night unless going at a speed that would kill him instantly. The 'he's magic!' Excuse. Magic is non existent and is made up for the happiness of children. Science is the future. Don't take the lemons, get mad.