Scientific Explorer Mould n' Glow Mega Ball lets you make a giant bouncy ball that glows in the dark! Layer in 9 different colours then soak in water to set.Includes a giant 7cm .ball mould, 6 packets of ball powder (10ml polyvinyl alcohol, glycerin, and butylated hydroxytoluene), 3 packets of glow in the dark powder (10ml polyvinyl alcohol, glycerin, butylated hydroxytoluene, and zinc sulphide), re-sealable bag and easy instructions.Recommended for age 6 and up.