Blaze Part 2

So, in my original post, I had questions. I have another one now, but first - here's my comment stating my theory of the world:

I'm pretty sure there was worldwide calamity where either intentionally or accidentally, all minds were transferred into machines, and thereby killing off carbon-based lifeforms. These very few kids that we see in the show are actually bioengineered clones made by mechanical scientists - either as part of a crazy and unethical experiment to prove that they can, or in an effort to bring the human race back from Extinction (similar to Jurassic Park). Maybe both?

That said, on the episode we just watched, Blaze helped save eggs in th Egg Warehouse from getting smashed. But the eggs weren't sorted by the dozen. They were each in their own basket with nesting material. Then the worker truck said something like, "Thanks Blaze! You really saved our eggs!" Our eggs?

Is this how the new world reproduces? Vehicles lay eggs? Or are the eggs incubators for the human clones, since they don't have any humans?