This is a question that deserves a careful and honest answer.
Scripture teaches that all children are born with a sinful nature.
The sin nature is passed from one generation -to the next. Children do not need to be taught how to lie, be selfish, rage or be stubborn. On the contrary, what they need to be taught is truth and righteousness. Therefore, it is essential to present the gospel consistently in terms that children will understand. The greatest part of ministering to children is that they are more spiritually sensitive than adults, They are less concerned about what others think and respond quite easily to Biblical truth.