Rhianta cadarnhaol yw'r ffordd fwyaf effeithiol o reoli ymddygiad anodd a helpu rhieni i ddatblygu perthynas dda gyda'u plant - dyma neges ymgyrch sy'n cael ei lansio gan Lywodraeth Cymru heddiw.
Positive parenting techniques are the most effective ways of managing difficult behaviour and help parents develop good relationships with their children.