This is because most coaches don't demand too much of the youngest students, otherwise the kids might shy away from gymnastics. Instead, coaches let them play to their heart's content so they can gradually develop an interest in the sport.
對於年紀較小的孩子，絕大多數的教練會讓他們儘量玩樂，培養他們的興趣，而不在技術上要求，以免一下子就把孩子嚇跑了。