Grow colourful crystals in the container provided. It's a fun, sparkling chemistry experiment. Contains one large bag of crystal base compound, one small bag of colour seeding mixture, one clear container with cover, one spoon and detailed instructions. The crystals will grow to approximately 5cm (2 inches) in diameter, and 4cm (1.5 inches) high. The size, shape and colour will vary depending on experimental conditions.

• Recommended for ages 10 years+.
• Available in assorted colours.