
When my eldest son was a kid I had this amazing set of cardboard cubes. It was gifted to us by another family. They were thick and lasted long enough that by the time our third outgrew them (about 7 years of rough play) they were still strong enough to pass us on. It's not like that at all. Super thin cardboard. If you're not careful, you can tear them during assembly. They've been open for less than an hour and some are already dented in the corners. And one is crushed. If I had time I would return them and try a different brand. I doubt they will last more than a year.

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