They are awesome. Well done and fun. My kids aren't that rough on their toys, but they threw them, hit them, used them as musical instruments, and they survived. Maybe there aren't as many little colored pieces in there as I remember from kaleidoscopes, but it looks better if you don't hold it perfectly level and my kids don't mind anyway. Another downside I think can dust or something else get in? I looked at at least one after giving it to my kids and wanted to wipe it off thinking they had already stained the "glass" but it didn't wipe off. Maybe a few small scratches and dents as it's plastic and not glass? But then again, my kids won't notice or care, so I'm still giving five stars.
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