Seek guidance from Allah & His Messenger ﷺ , Be mindful of one’s actions & decisions .

This hadith speaks about an optional prayer that was performed by the companions of Prophet Muhammad ﷺ before Maghrib prayer. It is reported that they used to perform two Rak'ah after sunset, and when asked if the Prophet ﷺ also did it, he replied that he saw them doing it but neither ordered nor forbade them from doing so. This teaches us to be mindful of our actions and not do anything without permission or guidance from Allah and His Messenger ﷺ. We should also be careful not to impose our own beliefs on others as we may not know what is right or wrong in certain situations.

The lesson here for children is that they should always seek guidance from their parents or elders when making decisions, as they may have more knowledge and experience than them in certain matters. They should also be respectful towards other people's opinions even if they disagree with them, as everyone has a right to their own opinion.