When they have questions such as “What happens when I mix all the colors together, or how much sleep do I need to feel rested before a big game?
Really, even if you don't make observations formally, you think about prior experiences with a subject in order to ask a question or solve a problem.
Formal observations are a type of brainstorming that can help you find an idea and form a hypothesis.
The scientific method is a systematic way of learning about the world around us and answering questions.
The key difference between the scientific method and other ways of acquiring knowledge are forming a hypothesis and then testing it with an experiment.