The child is playing hide and seek in the hay.
The boy is playing yard games at a farm.
Now the additional info that it's a boy (male), and is at a farm, gives a named location, playing yard games, it gives the suggestion that it's not just the one game.
exists e2 e1 e3 e4 x1 x2 x3 x4 x5 x6 x7.(n_hay(x7) & n_child(x4) & n_child(x1) & in(e4,x7) & Theme(e4,x6) & Actor(e4,x4) & v_seek(e4) & n_thing(x6) & Actor(e3,x5) & v_play(e3) & (x4 = x5) & Theme(e2,x3) & Actor(e2,x1) & v_hide(e2) & n_thing(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2))
exists e1 x1 x2 x3 x4.(n_boy(x1) & at(e1,x4) & n_farm(x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_game(x2) & of(x2,x3) & n_yard(x3))