[Junior Soccer - Practice Guidance] Foul or No Foul?

There are opportunities for third and fourth graders to practice together.
There is a fourth grader who gets rough when they lose their temper.
Fortunately, the third graders don't seem to mind much, so it hasn't become a major issue yet...

Especially during mini-games, when there is a struggle for the ball,
they immediately shout, "Foul!"
Since we have a referee (coach) during mini-games, the referee makes the call in those situations.

As contact plays increase, they gradually start complaining directly to the opponent. In worse cases, they might even throw the ball at the opponent.

What should be done in these cases?

Soccer is a sport with a lot of contact play.
Getting kicked is normal.
To win the ball, you use tackles and your arms to push the opponent away.
It is a sport where body contact is important.

When things don't go well, frustration builds up.
And getting kicked hurts.

Professional matches and players on strong teams have a high level of body contact.
I think that depends on the environment of the regular practice and what level of pressure is considered acceptable.

Is it a foul or not a foul? The one who decides that is the referee (the coach in practice).

・First, I think adults need to be prepared to firmly set the borderline. Do not draw ambiguous lines.

Having a strong competitive spirit is a good thing.
But you must follow the rules.
I felt that adults should firmly establish this boundary.

Regarding this matter, I am still asking myself these questions.
If you have any good advice, I would appreciate it.
Drawing the line for tackles and body contact.
If you have any advice on these, please let me know!