Some of them are parents looking for something to keep their children busy while at home.
请问:这里的looking是作什么成分?
【答】looking for something 是现在分词短语,作后置定语,修饰 parents 。
还有就是keep their children busy 可以改为keep.....busying?这有什么不一样呢?【答】不能说keep.....busying。
还有一个为什么是whlie at home,不能是when at home?又有什么区别?
【答】这里用whlie at home 或者when at home,都正确,没有区别。