Tedco Toys GC1004 Giant Magic Crystal - Aquamarine Blue Grow your own Giant magical blue crystal! Includes: Growing Pot (with lid), 2 bags of Crystal Powder, Crystal Seeds, Stirring Stick & Gloves Simply follow the instructions, add water and patience! Crystals start to form after 24 hours and will reach maximum size between 14-21 days Magical crystal will be unique - Grows up to 4 inches long