As a baby I believe we all have the indwelling God, Jesus Christ and the Holy Spirit on the inside. In the Book of Matthew we read that as adults we must be converted as a little child. Children are innocent and know no sin. They do not know how to sin unless they are taught. Jesus refers to the goodness in children over and over in the Word.
Most children are free spirits and full of unconditional love.
They do not know how to hate unless they are taught. They seem to have peace when we adults are troubled on every side. Most are very sensitive to the things around them at all times. They seem to be in their own little world. Yes, they are and that world is the world of God and heaven.