I would like to posit that “child-like” faith has to do with obedience rather than content. This obedience should be is quickly and unquestioningly accomplished. It does not apply to the content of faith.
Throughout this book, I have defined faith as action based upon some knowledge. Virtually the whole New Testament is about “maturing in the faith.” James 1:4 says “that you may be perfect and complete, lacking nothing.” Hebrews 5:12-6:3 speaks of “milk for young Christians and “meat” for the mature. I Corinthians 14:20 says that we are to be “mature” in our understanding. So, child-like faith cannot mean a simple understanding of our faith (knowledge).
A child who is taught to jump into his father’s arms, does so quickly and even laughingly. Properly taught, a young child will quickly obey. A child learns not to question his parents commands. A child learns to accept readily whatever a parent says.
So, I posit that “child-like” faith is quick and unquestioning obedience. It is not simple in not having much Biblical knowledge.
For more, see Childlike Faith.