The kid is on a float in the snow.
A kid is sitting on a float on top of snow outside.
One on a float is not necessarily in form of sitting.
exists p1 x1 x3.(n_snow(x3) & n_kid(x1) & exists x2.(on(x1,x2) & in(x2,x3) & n_float(x2)))
exists e1 x1 x2 x3 x4 x5.(on(e1,x3) & of(x3,x4) & n_outside(x4) & of(x4,x5) & n_snow(x5) & n_top(x3) & on(e1,x2) & n_float(x2) & Actor(e1,x1) & v_sit(e1) & n_kid(x1))