Back in 1971, an architect called Simon Nicholson published a paper called "The Theory of Loose Parts". He described a huge variety of objects, materials, "physical phenomena" like gravity, and other humans as all being different types of loose parts. Building on his work, early years professionals have coined his phrase to describe a type of play. Today, loose parts play is growing in popularity. Embracing freedom, imagination, healthy risk, and often the outdoors, it's not hard to see why.