I have this Karteikasten ordered the class set for third graders to practice learning words. Unfortunately, a bad buy. There are many small Einrasthäkchen who drop quickly and make the box then unstable. Even the roller shutter leaves very (!) Often his tracks and then must laboriously be fitted in place, which the children hardly do it alone again. If the box once down, anything is canceled with 95% certainty. To give the children the boxes for practicing home, I already trust myself no longer, because I am afraid that they provide transport in a rucksack not unscathed. A colleague cardboard boxes and is very pleased with this. If you want to grab a plastic solution that will not only stand on a table, but sometimes the room or between school and home is to be carried back and forth, is clearly wrongly advised with this case.