A little boy plays a homemade drum while two other boys stand behind him looking at the camera.
one kid plays a cheap drum while two others are behind him
A little boy is a kid, homemade items can be considered cheap items, "other boys " can be simplified to "others ", and those who stand behind something are behind said something.
exists e1 e2 p1 s1 x1 x2 x3 x5.(n_camera(x5) & exists e4 e3 x4.(for(e3,e4) & at(e4,x5) & Actor(e4,x4) & v_look(e4) & behind(e3,x1) & Actor(e3,x4) & v_stand(e3) & -(x4 = x1) & n_boy(x4) & card_eq_2(x4)) & n_male(x1) & n_boy(x1) & n_boy(x1) & while(e2,p1) & Actor(e2,x1) & v_drum(e2) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_homemade(x3) & (x1 = x2) & a_little(s1) & Theme(s1,x1))
exists e2 e1 p1 x1 x2 x3.(exists p2 x4.(behind(x4,x3) & -(x4 = x1) & n_person(x4) & card_eq_2(x4)) & n_male(x3) & n_person(x1) & while(e2,p1) & Actor(e2,x1) & v_drum(e2) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_cheap(x3) & (x1 = x2) & n_kid(x1) & card_eq_1(x1))