I found this post helpful today and hope you do as well. Here's a piece of it:
Parents: Keep Throwing the Rocks & Wait for the Sun
If you are are like Holly and myself, you can feel quite frustrated over your attempts to teach your children biblical truth. Regardless of how much they may memorize a catechism question or recite a Bible verse or passage, you always are tempted to frustration because you know that they are just repeating something to you and they do not fully understand what they are saying or the story you just read to them or what it means that "God made you and everything for His own glory," regardless of your attempts to explain it.