Children love to get dirty.
"They are drawn like magnets to muddy puddles, regardless of the color of their clothing. The mud can also have a powerful effect on their well-being," the BBC writes.
"Don't get dirty!" it used to be a constant familiar refrain, as parents watched in despair as their children ruined their best clothes.
Whether they were running through farmer's fields, climbing trees, it was inevitable that the children's whites would not turn brown by the end of the day.
With the growth of urban planning and the fascination with video games and social media, contact with nature is much rarer than in the past.
For many children, there is simply no chance of getting muddy.

According to recent studies, outdoor dirt combines with friendly microorganisms that can train the immune system and create resilience to a variety of ailments, including allergies, asthma, and even depression and anxiety.
These results show that outdoor exercise is not only beneficial for the ability to roam freely, but that some natural materials, such as soil and clay, also contain surprisingly powerful microorganisms whose positive impact on children's health we have just discovered. begin to fully understand.
"In addition to these restorative effects, outdoor play can provide valuable learning experiences. For example, the act of shaping and molding materials like clay or sand can help children develop the way their senses and movements interact, known as sensorimotor development," according to Francesco Vitranos, child neuropsychiatrist, psychotherapist and educator at University of Palermo.
Such activities, away from home or the classroom, can also help children find ways to cope with emotions that may be difficult to explore in other settings.