From Opposite-Sex Facing Dancers.
Boy raises right-hand palm out, patty-cake style; Girl raises left-hand palm out, patty-cake style. Touch hands, walk forward into the other dancer's starting position, while turning 1/4 (Boy right, Girl left) such that the Girl goes under the Boy's raised arm. At completion of the call, lower joined hands to waist level and form a normal handhold.
Ends in a couple, facing 90° from starting direction.