[rphillips]

There are inputs and outputs to life. Many, many, many things try to consume our ability to consume inputs. By consuming these inputs there is less time to create an output. These outputs are super important and can be anything: sports, 3d printing, art, woodworking, musical instrument, gardening, other hobbies or projects, etc.

The phone is an easy input to pickup. Make it easy to pickup something else to occupy that time to create something tangible (an output). Other comments mention "real world" and it is so true. Do something that rewards yourself in the real world. It'll be great for your kid too.