Fidget spinners may be the weird fad of the summer, but they're simple. Put between two fingers. Spin. Be amused. But multi-use fidget cubes exist on a higher plane of distraction. All six sides ...

This article was originally published at The Conversation. The publication contributed the article to Live Science's Expert Voices: Op-Ed & Insights. Fidgeting didn't start with the spinner craze. If ...