I love this word "playing is like a job, it's how they explore the world around them." Yes children are always busy when they are given opportunity to play, they get so busy like they have been given a task and that is where they can channel their energy and get things done. When they use such energy in their studies as they play, it helps them study well and learn fast.

Yes, a lot of children have been denied the access to physical socialization, they prefer staying all indoors with their tab to play video games, there are side effects to this no doubt. Success to you!