Create up to 12 amazing, colour-changing crystal bath bombs! Just mix water & powders to fill the moulds, add your chosen coloured crystals & wait until dry! Ready to use in under 1 hour. Watch the crystals change colour in water! Which colour will they go? Choose different colour combiniations each time to create different colour effects! Each kit comes complete with 3 coloured crystals & 2 mini moulds to make up to 12 unique gifts for your friends or special fizzy bathtime treats for yourself!