The best place to start is the article "Hidden Danger in Christian Children’s Books." It briefly explains how most Christian children’s books teach false ideas, and it gives you guidelines for choosing books that teach the truth.

Deciding what to believe about salvation isn’t like other decisions you make. Some decisions have little or no consequences if you’re wrong. A few decisions have serious consequences, but they end when your life ends.

Only the decision about salvation has eternal consequences. If you discover you were wrong after you die, you don’t get a second chance. And you live with those consequences forever!

If you want to be sure of what you believe and what you teach children, you need to base it solidly on the Bible. Don’t rely on what simply sounds right to you. And don’t blindly trust what other people say, regardless of what their credentials may be. There’s too much at stake.

You should read the Bible as the only source of truth and ask God to show you which interpretations are true. The article and the book on this website can help you do this. They include extensive references to Bible verses that clearly support what they say. Nothing is vague or twisted to support a hidden agenda.

The article also has a section "The way to know you’re right" that briefly provides more information about this.

The world is full of children’s books about the Bible, God, and Jesus. So how do you know which ones are true?

Ratings and reviews show only the opinions of other people. This is helpful when choosing most kinds of books, but you can’t rely on them when choosing books about spiritual truth.

Most people aren’t saved and have no idea what’s really true about salvation. Almost without exception, books with high ratings teach false ideas. They’re successful because they appeal to the sinful natures of people. They teach popular ideas about salvation, which are never completely biblical.

Biblical truth isn't popular. When it comes to spiritual things, the majority of people are not right. And, unfortunately, the opinions of pastors, family members, and friends aren’t reliable, either. How do you know for sure those people are right?

The only source of spiritual truth is the Bible. The better you know the Bible, the better you can decide who and what to believe. This is why the article and book on this website give you a large number of Bible verses to support what they say. You don't have to guess what's right, you can know for sure by reading the verses for yourself.

Unfortunately, even when people know a children's book isn't completely true, they're willing to accept it if it's cute and entertaining. They assume it's okay because it's only for children.

But that's a dangerous way of thinking. When children become teenagers and adults, they're influenced by what they were taught when younger. Satan knows this, which is why he invests so much effort in targeting children.