[He beams with pride at that. Compliments? He loves those, especially when they're coming from an adult.]

I've had it a few years so I guess it's been about that long to get it to this stage. Always a work in progress though, there's always things I think I can probably swap out or add in.

[He grins a bit, an actual smile. He holds the staff out.] Well, activating its functions would probably be tricky for someone your size but I'll let you hold it. You've built so many models so I don't doubt that you're careful enough.

Solar? Direct power conversion wouldn't work so well- not a good surface ratio for energy collection. Also a lot of our activities back home would be at night, not to mention we live in a sewer so there's not exactly much access to solar down there.