That was a question asked this morning. Here's a slightly longer answer. In fact, three answers:
2. Following that, doesn't it show what a great responsibility we have as parents? If our job is to "make disciples" (Matthew 28:19-20), what better opportunity than to teach our children well - we are their biggest influence. John Chapman said that his biggest regret about remaining single was that raising children is a wonderful opportunity to raise Christians.
3. However, it is not true that others don't often become Christians. Many (most?) of our own church family at Wellfield are not from Christian homes. Everyone has to make their own decisions, and just as 'Christian' children can sadly walk away, so others can come to know Jesus - and do so all the time. Our job as a church is to be proclaiming the good news of Jesus to people who currently don't know about him. And often it's those who know absolutely nothing who have fewest misconceptions to put them off.