Designer and TED star Ingrid Fetell Lee explains how to cultivate a happier, healthier life by making small changes to your surroundings.

When did you last feel joy? Changing your surroundings is the most easily accessible source in finding joy, says Ingrid Fetell Lee, former Design Director of IDEO New York.

In Joyful, she explains it's time to open our eyes to the physical world. By making small but powerful changes to the things around us, we can live happier, healthier lives.

Her TED talk has been viewed over 10 million times.

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