Well. The technology here is a little more advanced than we're used to, so we can't fix anything-

[He can't fix his own arm, but the kid doesn't know about that so he needs a better example.]

Usually, as long as it's an inanimate object, we can fix or make pretty much anything.

[There's some energy involved too, but he's not going to get into all of that, at least not now. If the kid comes up with more questions later, maybe.]

Some people are more versed in biology, or botany- but we don't work with that stuff.

[Or talk about it, really. It's nightmare fuel.]