Grow your own crystal. It’s a cool science project! Crystal will grow to approximately 4.5cm (1.7 inches) in diameter. However, the size, shape and colour may vary depending on experiment conditions. Contents: 1 bag white crystal compound, 1 bag red colourant, 1 crystal base, 1 stirring bowl, 1 stirring spoon, 1 display cover, 1 coloured wrapper, 1 circular card cover and detailed instructions. Ages: 5+.