There is a pretty significant chance that ours will be a starfaring civilization and that our children will reshape the very heavens.

Very doubtful when you really dig into what is involved. We probably will never make it out of the solar system. To another star is a pipe dream. We will wreck our planet soon enough and the likely outcome is our species will go extinct. This will probably happen in the next few thousand years or sooner.

Even if you colonize the entire solar system or even the entire galaxy, you will still be insignificant in terms of the universe. Also there is a pretty significant chance we destroy ourselves before any of that happens.

I suppose zero is a pretty significant number.

Without new physics that isn’t even remotely visible on the horizon and that utterly contradicts most of what we believe to be true, this isn’t going to happen. Robotic AI probes sent to other star systems to send back telemetry? Sure, fine. Flesh bags sent to self-replicate on terraformed worlds out in the stars? Not a whisper of a microscopic chance.

If by "children" you mean self-replicating viral robot swarms, then maybe. Nothing biologically descended from humans will ever leave the heliosphere in any form that could be considered living.

Our kids can't change a tire.