Nevertheless, it is not wrong to backgrounds and explanations given to - and when it first read only the parents who should be according to instructions always with yes. What children learn in the first place, is patience: the growth of the aluminum salts takes a few days and can not accelerate much. The very fast so do not delight sets in, but the result is at the end already convincing. And when the children learning that is sometimes worth waiting, then that's enough for me educationally.
There are quite a lot of science kits, where you spend a lot of money for little content. In this instance, one can not complain, the price-performance ratio is okay. Because the box externally hermacht some, it is very suitable as a gift.
The age requirement, I would not look quite so tight: until 12 recommends the cosmos, but the reason does not open up completely. In our case, an 8-year-old from the box was very impressed and has also (with adult accompaniment) fell on the crystal experiments without taking physical or mental damage. That you should not drink the solution with alum salt, opens up also at this age already. Most critical is probably dealing with the gypsum, but under the supervision of which is not a problem. If you want to observe all safety instructions in the booklet, one must in any case no longer budge.
