It took me about a dozen to figure out how to hold the first folds during assembly so they wouldn't fall apart during assembly. But it was worth the initial feeling of needing an extra hand when my 4 year old saw them and lost his mind. He plays with them every day, building forts, blocking doors and, yes, stacking them to crash into them and knock them over. I'm so glad I have them and am considering buying another set.
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