He would say, avidly, that his world was incredibly interesting. It was why he wanted to fight so hard to protect it and humanity so they didn't get wiped out.

"That's half the fun though." He grinned. "When I was your age, I was trying to make my own rocket to get up into space." Senku explained. "You have to be really good with technology and mechanics, as well as chemistry to pull that kind of thing off." He paused.

"Oh and be outside, with safety equipment. My dad was really insistent about not experimenting with things that could blow up in the house."