Although some of the experiments take time to see the results, it's been fun doing them with my son. He is 11 years old and VERY MUCH into science this year. One of his interests is crystals. Fortunately, this kit comes with a few VERY FAST immediate result experiments that were fun to do. Some take up to three days, but they are worth the wait. It does take some adult supervision, but they are very educational. Even my 4 and 6 year old girls are interested in the projects. The directions are easy to follow and all the materials needed are included in the kit. I highly recommend this kit if your child is interested in crystals and watching them grow. :)