Despite being in peak shape this is why my kids crawl everywhere. I could never take a chance with a stroller with wheels. Too many variables. 

If my kid can out crawl me then so be it, but they ain't outrolling me. Never. 

 Interesting take I can get behind this idea, this is the natural order  

 It is. 

I've never seen a stroller in an ancient cave painting.. just depictions of little hunter gatherer babies crawling on mammoth hunts. 

 You never saw a phone there neither... 

 That’s funny