We, as parents and guardians, raise our children to know God. If they are grounded in their faith they should thrive anywhere. Will they face diverse temptations and philosophies of human intellect? Sure. Will God, by His Sovereign grace protect them from the evil one? We pray so.
We have many wolves in the church, masquerading as sheep. There are many, many false doctrines oozing out of Christian Universities. Open Theism and Evolutionary Theology come to mind. Anti-trinitarian views abound as people bring back heresies.
Entrust your child to God and remember that God gave you a very unique path as He has been sanctifying you. He will do similarly for our children.