Chris went to a friends house last weekend to return a drill he'd borrowed. He came home with a bag full of broken electronics. I raised my eyebrows but his plan was that he and Unity can take them apart together and look at all the stuff inside and maybe try to fix them. Ok then.
While I don't share this fascination, I do love that Chris shares it with her. Partly because he wants her to feel comfortable tinkering, since sometimes boys are more encouraged in that pursuit than girls. And partly just cause he does enjoy it and it's a way that they can spend time together, working on a project.