Grow sparkling, colourful crystals overnight from a safe solution of potassium aluminum sulfate. Single out the largest crystal shard, redissolve the remaining crystals, and repeat the crystal formation process to grow a larger, more striking crystal. This kit includes four packets of crystal-growing salt and two dyes (red and blue) so you can grow a variety of crystals in different sizes and colours.
- Classic, perennially appealing science activity kits at great prices
- Fast, fun, and simple experiments
- Three-language packaging and manuals (English, French, Spanish)
- Backed by 100+ years of experience in quality and safety