Nothing occurs - just a stool

My wife bought this stool for itself as occurs and for our daughter as an increase, so that they can join in the kitchen.
I see that thing and wanted to get something from the top cabinet, so I (90 kg) and it also stood almost back on the floor. The center has flexed and is torn. My cooking is fortunately still intact.

Why a non-slip surface when you can not stand on it. How shall I know that this is a stool and nothing occurs? Do I have every time the subject beforehand inquire about the Internet, what I can do with it and what is not? It looks like a kick, but is not that I think already dangerous. Do for our little ers yet, but I would not buy this junk, I'd rather tinker wooden what clever. Grandma's wooden stool still holds, the folding function does not weigh on the.

Servus!