Glo Pals Light-Up Cubes - Cookie MonsterSunny Days are right this way because everyone's favorite furry monsters are here to make playtime bright! Simply drop your Sesame Street x Glo Pals Light Up Cubes in water, or insert one into a Character, and watch them light up like magic! Light Up Cubes automatically turn off when removed from water. Each pack includes 4 reusable Sesame Street Light Up Cubes. Cookie Monster Cubes glow bright blue.