This Barbie Dreamtopia Rainbow Magic Mermaid doll -Color-change transformation: Dip Barbie doll in warm water and watch her hair, bodice and tail instantly change color to reveal a rainbow of pretty pastels! Dip her in ice-cold water to see her change back to her original neon-bright look and relive the transformation again and again. Doll cannot swim or stand alone. Colors and decorations may vary.