Price performance ratio, ok for the home, unsuitable for school

These preparations were delivered in a wooden box. The closure is unfortunately broken, so care must be taken during transport. The specified items are included in the box and in a clear and safe (except for shutter) packaged. In the cover, a list was eingekelebt which is numbered from 1-25 and in which you can write notes or the German translation of the preparations.
For microscopy shows that small errors have occured during the production, so are for example air bubbles under the cover slip, which can irritate the untrained eye strong. In addition, missing -at least in my boxing ant 3 legs, which is very annoying!
Overall, it is possible using this box, very cost-effective to obtain insights into the microcosm, however, under restrictions, probably explain the low price.