A young boy sits outside in a grassy field with his back turned towards the viewer- he is holding a wooden toy that can be spun between your hands and launched into the air.
A child plays outdoors.
If the young boy, a child, is with a toy in  a field, then he plays outdoors.
A CHILD CAN BE A YOUNG BOY AND GRASSY FIELD IMPLIES TO BE OUTSIDE
A young boy sits outside in a grassy field so it has to be  A child plays outdoors