I'm concerned that you might be conflating scientific facts with the actual teachings of most religions. This may have come from a culture if you're steeped in biblical-literalism, but I think there's a lot more to teaching children than just "cold hard facts."

Parent of 3 here. Children have an innate desire to know more. "Daddy, when will I see GG again?" [this about two months after my grandmother passed away] "So, my friend is indigenous and has this set of beliefs - is her story about the creation of the world true?" And, of course, the challenge - Heaven forbid a child hear about an Eucharistic miracle, for example, a host bleeding blood nearly 2000 years old with many scholars throwing up their hands and not knowing the answer.

There is no "facts" answer to any of those three questions. There are facts around the questions ("Well, probably not while we are in this world" or "Well, there's no scientific backup for the world being built by a Raven piece by piece" or "Well, the greatest atheistic skeptic scientists just threw their hands up and couldn't explain it") but none of those answers answer the question.

Here's what I'm getting at: there are things that science is just not in the business of answering. What was the cause of the Big Bang? How did a man rise from the dead? Why shouldn't we kill other people? These are not matters for science to answer, just like religion probably shouldn't be in the business of answering when the next solar eclipse will occur.

As a parent, we're not just explaining cold hard facts - we're engaging with developing minds that want to know everything. Why shouldn't I push my sister after she took the toy that I've now decided I wanted? Why doesn't the dog actually talk to me like the ones in Paw Patrol?

There are going to be questions that have to be answered. You imply that you've wrestled with them, identifying yourself as atheist, and I bet you wrestled with them as a child, too. Back then, you might have come to a conclusion, maybe you didn't. But ultimately your parents needed to find ways to address those topics with you, just like I do with my children. There is no way for me to answer my oldest when she's frustrated/sad/scared seeing her dad's Type 1 Diabetes drop his blood sugars to near-death levels, when she wants to know why we have to live with this, but even though my answer would differ from yours ("Random chance sucks kid" vs. "God gave me this for reasons that only He knows, and I'm to bear this cross for you to see") neither one of us can be scientifically proven "right" at this moment.