National Geographic Purple Crystal Growing Powder

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Grow an amazing purple crystal with this fabulous science kit from National Geographic. Grows in less than a week! Learn all about crystal formations and watch the crystals grow da y by day. This science kit includes: 1 x Bag of Purple Crystal-Growing Powder (3.35 oz / 95 g) 1 x Seed Rock Learning Guide with Instructions Manufacturer's Recommended Age: 8+ Show more