I didn't have the opportunity to help make all the crystals, but tried one to make sure it worked. In less than twenty-four hours, the crystals formed beautifully! My son is delighted and two more will be launched later today. Just make sure you boil the water :) My kid got a random, different brand for Christmas and it didn't work as intended and he was frustrated. To be honest I think it was my fault because I didn't boil the water long enough and it looked like fluffy crystals. In any case, with the Mini Explorer version, I made sure that the water boiled very well. Update: I wanted to upgrade earlier, but all three turned out great. I made a small mistake with the first crystal. Make sure you can see the crystal above the water to release it. It's stated in the directions, but I lost them at the time. They were amazing and my son enjoyed watching them grow and then flaunting them when he pleased.
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