Travelling with small kids with a small backpack is very liberating, a paperclip solves most problems if you are a hacker even when handling small kids. It's more of an attitude than anything.

We call them "carts". They have four wheels, let you haul around a lot on foot and have been in use for centuries.

Well, don’t buy bagels and donuts and coffee. I don’t do lunch and I also skip breakfast on odd days. I’m also constantly in motion, like, right now, I’m doing leg lifts that are imperceptible to the the human eye - I call them hummingbirds. You really should stop cultivating mass, and start harvesting.