Do you teach this to your children or allow them to serve God if they want?

I'm very honest with my children about my personal turnaround. They also know I'm always open to any discussions (on any subject) without fear of being judged or lectured. If they choose to serve God (I'm assuming you mean in the Christian sense) I'd certainly ask them questions about it, want to discuss it, and share my own experiences with them. Try to imagine how a Christian would feel if their child converted to scientology or <insert cult>. This is pretty much how I would feel. However, I've raised them to be intelligent and rational, and ultimately I'd never disallow them from making any decisions about their beliefs.