Sledding. It works for us.

A few days ago I went out to play in the snow with the kids (More for supervision so they didn't crack their heads open).  They do this body sledding on the side of our house.  I don't let them use a real sled to prevent the speeds from increasing to much. There is a death drop at the end of this hill and if I can't stop them the trees will.  They wore their little bodies out by going up and down this hill for 45 mins.  The next day the snow was all gone.  It warmed up to 50 degrees.