Children need to "play is the main", need to "learn through games, play and learn". If you can ensure this, then don't worry about overloading. But schools nowadays think little about education with such gentle forms. So as soon as they go to school, they are afraid to learn. The more you are crammed, the more afraid you are, the more pressure you must bear. Today's teachers also often have imposing ways of teaching. Students are only passive acquirers of knowledge. While at lower levels of education, the more it is necessary to adjust the way of teaching, how to let children do a lot, be more active, gradually discover and form their own thinking. That is "how to learn in fun". I think the key to "anti-overload" is that.