Lean thinking is a way of looking at how we do things to make them better and faster. It started in a car company a long time ago called Toyota. They wanted to find ways to make their cars really good quality and not waste any time or materials.
So they started to think about each step of making a car and ask themselves, "Is this step really necessary? Is there a better way to do it?" They wanted to get rid of anything that didn't add value (or make the car better) and make each step as efficient as possible.
For example, they saw that sometimes workers had to walk a long way to get tools or materials. So they moved the tools and materials closer to the workers, so they didn't waste time walking. They also noticed that sometimes they had too much of a certain part and not enough of another part. So they started to only make as many parts as they needed, so they didn't waste any materials.
The idea of lean thinking is to always look for ways to make things better and faster. It's about being really careful with resources and not wasting anything. It's also about constantly improving and never being satisfied with how things are. It's like always looking for ways to make things easier and more efficient, whether it's at work or at home.
So, to sum it up, lean thinking is a way of thinking that helps us make things better and faster by getting rid of anything that doesn't add value and finding ways to be really efficient with what we have. It's like always trying to find a way to make things easier and better.