The majestic Saguaro takes more than 70 years to grow. Now, create your own at home in hours. Watch as the tiny micro crystals effloresce, cluster, and bloom. This kit includes the paper form of the Saguaro, a tray, a terraforming solution, instructions, and Saguaro facts. Our take on the classic crystal growing tree science toy. We now have a crystal growing kit that is both iconic and educational, hands-on STEM STEAM. 3.5x2x7.5" box. Recommended for science gifts, nature gifts, an all ages fun hands-on DIY kit, a modern take on classic toy science demonstration. A great fit in many retail locations: art museum, science museum, childrens museum, botanical garden gift store, toy stores, souvenir store, stationery store. paper and novelty store. These crystal trees are a delight to build and grow.