Children should first seek permission before entering their room

The children should not enter their parents� room until and unless they have obtained permission first.

"Yet when the children among you attain puberty, let them ask leave of you (at all times), even as those (who have reached maturity) before them have been enjoined to ask it." (Qur�an 24:59)

To stand before them (parents) as a mark of respect. And as a mark of respect, children should stand when welcoming their parents.

The Prophet (pbuh) used to stand to welcome Fatima (his daughter) when she came to visit him. And the prophet (pbuh) used to kiss her and invite her to sit. Likewise, Fatima used to stand to welcome her father whenever he came to visit her. And Fatima used to kiss him and invite him to sit. That was how Siti Fatima (may Allah be pleased with her) used to show respect to her parents. (Abu Dawud, Al-Nasai ans Al-Tirmidhi)