The decline of play in preschoolers — and the rise in sensory issues "If children were given ample opportunities to play outdoors every day with peers, there would be no need for specialized exercises or meditation techniques for the youngest of our society. They would simply develop these skills through play."

https://www.washingtonpost.com/blogs/answer-sheet/wp/2015/09/01/the-decline-of-play-in-preschoolers-and-the-rise-in-sensory-issues/