Have you ever heard a little kid tell a story? Did you pay attention to the way they told it? It was probably not a tale crafted to perfection. Maybe they went off on too many tangents and never got to the point. Maybe they only gave you the bare bones of the tale, revealing nothing exciting.
As a general rule, don’t write the way a child would speak.
When you write, you should give your readers more than the bare bones, but don’t abandon your plot altogether either. It can be tricky to find the middle ground, the happy medium—that’s what subplots are for.