Yes she is. My daughter is on the site and she just turned 13 last week. Their are many young christians on this site and that is why we have set a lot of the rules here. To keep it as safe as possible for them and to make it a family site. That any christian young or old can come and share the Lord with people all around the world.
I hope your family can enjoy Talk Jesus. There is an arcade also here on the site that my younger son enjoys being in. It is a safe game room for him. He is 9.