4M Crystal Growing Experimental Kit | A Science and Chemistry Kit for Kids Ages 14+ | Grow your own Crystals, Large

Excellent. My grandson was delighted and is watching them grow.

Saved using this until I knew we could have the heating on having read other reviews re poor results. Clear instructions. We put them on a shelf above a radiator to ensure optimal growth and were really pleased with the results. Ended up with spikey and cubed crystals of various sizes which my 7&8 year old boys enjoyed checking each day. Useful info re learning points for kids also included. We think it was worth the money and a lovely project for half term :-)

White didn’t crystallise but I may have gotten it wrong

Quick delivery. My Grandson loves this crystal growing kit.

First thing read the instruction. These do work best when using freshly boiled water, distrurb as little as possible, don't keep in a room too hot (as UK had recently) or too cold (how UK is 50 weeks of the year) I did two of these kits and one during heat wave didn't work as well. The crystal climbers it's best to take out rather than push back in. Make sure u don't ignore them as I left for 2 hours and they took over in the heat. When the crystals are to size drain the liquid don't wait for all the liquid to evaporate. Wear gloves when handling the crystals. Work out what colours you want before you start as the seed crystals come with just enough so big crystal is one pack, so don't use all one colour of want different shades or colours than white, red and blue. Or as my first one white, red, blue, purple and one was red,blue and pink. It's a great kit to do with kids but maybe have adult mix, handle and display and let kids watch then grow and in display case ( maybe tape the case or could drop on floor and break (yes I dropped few b4 taped them)

The item description looked good, so we bought this for my 10years old son as Xmas present. We have followed all what is says on the manual, but could not get a nice looking result. The manual does not says what is the ideal temperature for it, and even how should we know when the crystal is at it's mature point? We were having nicely developing crystals, but may we waited too long, or who knows what was wrong but the crystals collapsed creating a flat container sized something. We left it at a place where the kids could not reach - safeguarding the developing crystal against crystal-breaking shaking or anything else. You just can not see through the liquid if you choose dark colour mixture! So, you don't know when it is good or bad or ready, when you should drain it or what? Even how you supposed to know if something is getting wrong? So, may a more detailed manual would avoided our not happy ending experience, but may would work better at other's houses - who knows?

My Nephew loved this! Worked really well and kept him entertained.

I didn't have high expectations - but this crystallisation kit worked quite well in the end. Just follow the instructions and you can't go far wrong. It takes about a week before the crystals are large enough to be harvested. The larger pot takes a few days longer. The mix colour crystals gave nice results. Its a fun way to get kids interested in basic science. The age indication is for 14 & upwards, but I think this would be more more interesting for the 10-12 age group. Not a bad kit overall.