Children and adults learn better and more effectively by making mistakes. Good advice is important, but nothing achieves a better learning result than a flawed decision.

A baby's brain learns the basics of body control by using its limbs at will. If it achieves the desired result, a positive signal is sent to the brain. If the movement does not achieve the desired result, the signal is weakened. The weaker the signals for undesired movements become, the stronger the positive signals become.

The same principle applies to the learning process throughout a person's life. It is therefore wrong to penalise mistakes or to want to avoid them in principle, unless they are life-threatening dangers.
Studies show that pupils learn faster and more effectively if they make lots of mistakes along the way. If the teacher tries to prevent them from making mistakes, the learning outcome slows down.