The two young children are in black and white face paint and costumes while riding in a stroller, they are being pushed by a man also in face paint and a costume
The kids are getting their face painted.
Kids and children are synonyms. Face paint is used as an adjective noun combination in the first sentence, and face painted is used as a noun verb combination in the second sentence.
exists e1 p1 p2 s1 x1 x2.(n_thing(x1) & n_child(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1) & while(p1,e1) & in(e1,x2) & exists e2 s4 x7 x8 x9 x10 x11.(in(e2,x8) & subset_of(x11,x8) & n_costume(x11) & subset_of(x9,x8) & n_paint(x9) & of(x9,x10) & n_face(x10) & a_also(s4) & Manner(e2,s4) & Actor(e2,x7) & n_man(x7) & Theme(e2,x1) & v_push(e2)) & that(x2,p2) & n_stroller(x2) & Actor(e1,x1) & v_ride(e1) & exists s2 s3 x3 x4 x5 x6.(in(x1,x3) & subset_of(x6,x3) & n_costume(x6) & subset_of(x4,x3) & n_paint(x4) & of(x4,x5) & n_face(x5) & a_white(s3) & Theme(s3,x4) & a_black(s2) & Theme(s2,x4)))
exists e2 e1 x1 x2 x3.(n_face(x2) & of(x2,x1) & n_thing(x1) & n_kid(x1) & Theme(e2,x2) & Actor(e2,x1) & v_get(e2) & Theme(e1,x3) & v_paint(e1) & (x2 = x3))