Your children have the right to be lead by your Islaamic example. One cannot just tell their children to do something while they themselves do not do it. Allah says in the Qur'an, 'Enjoin you Al-Birr (piety and righteousness and each and every act of obedience to Allah) on the people and you forget (to practise it) yourselves.'
[Surah Al Baqarah, 2:44]