Obedience. It's quite simple really. You simply obey what you are told or taught. Not much to it. Until you don't obey.
My daughter has wanted a Wubble Bubble Ball for a while now. They are sold out everywhere and very hard to find! They're even sold out on their own website.
While running errands, I ran across a few that were actually in stock at a store (sunshine moment!). I couldn't believe it. I bought my daughter one. We played with it lots yesterday. It was fun. This morning she wanted to take it over to the park - so she could play with it in a larger area. Pine trees line the edge of the park. As she was walking out the door I kindly reminded her to NOT let it touch the pine trees. It would pop it.
Five minutes later she was back in the house with a popped ball. She let it hit a pine tree.
Simple obedience. It's simple really. You simply obey what you are told or taught.