These Barbie? Dreamtopia mermaid dolls feature a color-change transformation that lets imaginations dive into their most colorful fairytales yet! Each Barbie mermaid doll features a neon-bright fantasy look with rainbow hair, a vibrant multi-colored tail and a bodice with sea-inspired accents. Ready for a color transformation? Dip Barbie doll in warm water and watch as her hair, bodice, tail and fin transform to reveal a rainbow of pretty pastels! Dip her in cold water to help her change back to her original neon brights, or simply wait for her to dry and relive the transformation all over again.