Today’s day our children are not maturing as young as they used to when we were kids. Due to the technology generation we are in we also need to keep an eye on our children much longer until they are about 20 and mature enough to know for themselves how to stay away from bad things that effect their frumkeit
The less Tumah and gashmius you bring into your home while your children are young the earlier they will mature and be secure to remain frum without the need for you to babysit them