Happiness Children

Do you think that in general, children are worth having and a source of happiness, or an unnecessary burden?
I have only 20 so I dunno))
Reasons 1 and 2 are absolutely true, until you reach puberty. Then you go for any reason 3 for several painful years. Although I consider that the reason 3 as "Thankless burden" and no "undue burden." During this time helps keep the remembrance of the reasons 1 and 2 to keep his sanity.
Happiness is…