Kissing the forehead of the elderly is [an act of] reverence and honour [towards them]. It is [merely] a practice and not an act of worship; as [can be] seen from this [narration]…
From the mistakes which parents fall into when uttering wrong words in front of their children, is that they censure the children when they utter them [too]!
As a father, it is not your job to remove the thorns from the path of your child – out of fear they may scratch.
Some children give their parents gifts, and this is nice, and being good to them, and [a show of] affection [to them] – may Allaah reward them with good.