I'm doing shopping in the original

The key and the trick, Hua and Long are simply inadvertent, the two of them should just think that turning is very interesting, but they don't understand the principle, so since the spindle turns, the hemp also turns, thinking that the reverse can also be done, so they fixed the hemp After rubbing on a wooden stick.

And the two of them have a lot of strength. During the pull, the inertia of the wheel will turn the hemp rope back again, and the wooden stick will rub against and generate heat in the rapid rotation again and again.

It happened to be the one who took care of the fire. When playing, I might place it on broken leaves or plants suitable for tinder, so I got fire.

"Okay...you two."

When Uro came to this world, he was stunned for the first time.