4M Crystal Growing Kit

Very affordable, fun activity! The crystals started growing within hours. You definitely have to follow the directions and times to a T to make sure they grow correctly. Our pure white one, small one grew the best. I am tempted to buy another kit and figure out what exactly causes better crystal formations...is it the "coloring seeds" and their shape/size?...Some of the seeds are mere granules and others are bigger, similar to a tiny rock. Maybe just putting 1 larger "color seed" is better for the smaller container?...The varying sizes of the coloring seeds also make it a little difficult to accurately measure "one scoop"...but overall definitely a fun experiment and better than watching plants grow! lol...younger kids definitely need some help as well.

This set is AWESOME! I highly recommend it! I purchased it to grow crystals in the office as a fun experiment to keep me entertained during busy season and it did not disappoint. You need to be sure to follow the instructions carefully. I made a fatal error on my first attempt and did not wait the full 30 minutes before I added the crystal seeding and nothing ended up growing. On the subsequent attempts I followed the instructions to a T and was able to grow beautiful crystals. I even ordered a second set because the results were astounding. The steps are simple enough I was able to grow these in my office with ease. All you need is boiling water and the rest is provided in the kit. The first step is to dissolve the crystal mixture (it looks almost like sugar) into hot water. Next, you have to let it sit for 15 minutes, and then transfer it into a clear plastic container where the crystal will grow. WAIT ANOTHER 30 MINUTES after the water is transferred. This step is crucial otherwise the crystals will not grow. Once you have waited the allotted time you drop in the crystal seeds. They provide blue, red, and white crystals so you can mix and match them to create different colored crystals. It seems that each type of crystal seed grows a different shape of crystal. I noticed that the red crystal seeds will grow more block-like crystals whereas the blue seeds will create more sharp/pointy crystals that flower out. Blue and red will create a crystal that looks like a combination between the two - it flowers out but is more block-like. Keep this in mind when you choose the colors you make. You will start seeing growth overnight. Its amazing to watch the progress. On the instructions it says it takes 4-7 days before the crystals are fully grown. I would keep an eye on them and drain the water when the crystal is about to emerge from the water. If you leave it too long the crystal is exposed to the air it will form "snow-like" growths on the top (which I think are ugly). The rate of growth will be affected by the temperature of the room as well as the size of the crystal you are growing. The crystals grow well in warmer temperatures. The small crystals will finish growing faster than the large ones. Each bag of crystal mixture can either make 1 large one, 2 medium sized one, or 4 small ones. The kit allows you to grow 1 large crystal, 2 medium crystals, and 4 small crystals simultaneously because that is the amount of containers they provide. If you want to grow 3 large ones you can grow them one at a time because they only provide one large container. I think the large crystals are the coolest.All in all this is an amazing kit. Everyone in the office is jealous and now they want to grow their own crystals too. 5 stars!!! I want to make ALL the crystals!

I got this for my 6 year-old son. He was so excited to grow his own crystals! The directions were pretty easy to follow and all the materials were portioned and ready to use. Overall we were really happy with it. It did require a lot more help from me than I anticipated. You had to boil water and then pour 600 ml into the clear container. I definitely cant let my kid boil water. Also, you had to have a place where they would not be bumped or disturbed for at least 15 hours. Easier said than done in a house with kids and pets, but we made it work. If I could change anything, I would make a line or some indication on the clear cover to indicate how far you should fill it. To take a pan of boiling water, pour it into a measuring cup to measure out 600 ml and the pour it into the clear cover is a bit much. The large crystal and 4 small ones turned out well. We didn’t have good luck with the medium sized ones. This was really fun, and I would buy it again!

Daughter loved working with these. The crystals didn't grow as much as I thought they would but that could have been user error. House vibration disturbing them too much. Still fun to see them growing as much as they did.

Grade schooler liked it

Second update: Added stars for the third and final try. Clear crystal packet with a tiny bit leftover from blue created really nice crystals but no where near as big as shown in the pic. They did lose a star for the display containers tho because none of them fit with the lid at all. Spent 2 0 on this kit and saw it was reduced by more than 5 a few days later. Fun results but would not buy again for the price. Update: Tried the blue crystals and had better results with one of the two crystals. The one using just he blue crystals grew quickly, the results in the picture were taken at day 1, 3 and 5 and we washed out at day 5 when it started to grow out of the water. Leaving the red and blue mix crysta in longer as we don’t see as much growth yet. Original post: Kids were so excited about this gift only to have it fail miserably. We followed the instructions exactly and didn’t even attempt to mix colors hoping to get a vibrant red full sized crystal. Even set up a room just for the crystal set at exactly 68 degrees and all we got were crystals growing on the outside of the water that crumbled. See pics at day 4 and day 7. Will the another packet and update the review if we see any better results.

This was a Christmas gift, and so far they have turned out well. We have only completed the 4 small crystals, and they all look nice, but the color did not turn out well on the "purple" crystal. We may not have put enough blue color to balance it correctly. Ours grew for 6 days, however we did see results after 24 hours. They all had the flaky growth on the outside of the cup, which cleans off easily when they are finished growing. We started seeing this around day 3 on the dark blue, and by the end of day 6, it had occurred on all of them. The 2 blue seem to be more delicate than the 2 red. Some people said they followed the directions to a T, and did not see results. One thought is perhaps the temperature of the room where they were growing them is not warm enough. I believe the directions say to make sure the room is above 68 degrees. We grew these in our basement, and I made sure to turn up the heat to 70 while these were growing. If you follow the directions, keeping in mind the temperature, I don't see how it can't work. One last thing...it definitely requires adult supervision (really they have to do all of the work), I would say up to at least 12, due to the boiling water and chemicals. We will finish these out as is, but I would buy it again, and make 3 large crystals, or all medium. I wouldn't bother with the small crystals.

I bought this for my daughter at Christmas and I was a bit overwhelmed reading the instructions, but if you follow them to a T, you'll end up with crystals that look just like the ones on the box! She (5 years old) helped me mix but I did most of the work as you have to deal with boiling water and not over handle it once it's mixed. We did just one to see how it would go, and we mixed the red and blue color to make a purple. I put it in our heated basement so it wouldn't get bumped and would be warm, and checked on it every few days. At first it just looked like purple mold growing on the inside of the cup, and it crept up to the rim. Then I noticed something was poking up from the middle of the liquid. I gave it a full week to grow and then got impatient and dumped out the solution and found a beautiful purple crystal inside (see pic!) The stuff growing on the inside of the cup wall just crumbled down the drain but the actual crystal is awesome! I can't believe it actually came out as well as it did and we'll be growing the other colors right away! A fun project for yourself or with kids. Just follow the instructions, then don't disturb it for a week or so and you'll have perfect crystals, too!

Está padrisismo O y crecen los cristales bien padre se los súper recomiendo p

I genuinely enjoy this product—it’s practical, durable, and worth every penny.

Le encantó a un niño de 12 años y ya están creciendo sus cristales.!

All good, no dislikes

Bonne achat mais attention au tâche . À faire avec les enfants!