Four is a special age. So are two, eight, and sixty-seven... but four is soooo on the cusp between toddler/preschool/"LITTLE" boy and something else.
Soon he'll try to stifle tears. Soon it may not be second nature to hold hands with a buddy when going downhill, a little ahead of the group, forging a path--but together.
But for now... here he is. Holding nothing back, and unafraid to hold on.