I am often asked why we emphasize memorization of the First and Shorter Catechisms at our church. I think Dr. R. Scott Clark does a great job in responding to this question in the following link (http://wscal.edu/academics/faculty/r-scott-clark/reformed-confessions/why-we-memorize-the-catechism). Take a look at it. It will be helpful to you as you disciple your children.
http://olympiabp.blogspot.com/2014/10/catechizing-our-children-pastor-tito.html
Put the internet to work for you.