A little boy holding a yellow , plastic shovel , crouches in the sand .
A boy is making a sand castle .
A little boy holding a yellow, plastic shovel, crouches in the sand.
A boy is making a sand castle.
even though the boy is playing with the sand, it is not clear that he is making a castle.
even though the boy is playing with the sand , it is not clear that he is making a castle .