Only made the large crystal so far but it has worked really well. Larger than we expected and looks quite impressive. Have to read instructions carefully as it's easy to go wrong but we enjoyed doing this with granddaughter and looking forward to making the rest of the set.
Crystal growth was amazing and granddaughter was so pleased with the results that she took pictures on a regular basis then downloaded them into a Publisher presentation which she took, along with her precious crystals, to show at school. Very educational. Bought for her 9th Birthday.