The boy and girl are playing with arm floats on.
Children splash in a kiddie pool while others run through the sprinkler.
A boy and girl don't necessarily have to be children and just because they have arm floats doesn't mean that they are in a kiddie pool. It's unknown that others run through the sprinkler.
exists e1 s1 x1 x2 x3 x4 x5.(n_girl(x3) & n_boy(x2) & subset_of(x3,x1) & subset_of(x2,x1) & a_on(s1) & Manner(e1,s1) & with(e1,x4) & n_float(x4) & of(x4,x5) & n_arm(x5) & Actor(e1,x1) & v_play(e1))
(x)