Leareth emerges from his reading first (he has less of it, though he's eyeing Vanyel's pile speculatively, some of those are titles he knows but where the entire work has been lost). He volunteers himself cheerfully enough; he's very in favour of computers as a concept and would like to get to it promptly. 

Cam can make a scanner in the backyard and put Leareth in it. "Hold real still," he advises. "And close your eyes so they don't saccade, and when I say when take a deep breath and hold it, just for a few seconds while it gets the image."

Leareth follows the scanner instructions. He's pretty good at holding still. 

When the scanner beeps Cam says "all done, wanna look at your brain?"

"Yes, definitely." Leareth scrambles out and comes around to look. 

Here is his brain! Cam is squinting at it and comparing it with a picture on his computer to find discrepancies.

That's very impressive! Leareth peers curious at it, but he's completely untrained in reading brain-scans and unlikely to notice anything before Cam does. 

Vanyel takes a break from his reading and wanders out to join them. "Oh, is this the scanner? You can do me too, if you want." 

"Wouldn't hurt!" He repeats the instructions for Vanyel.

Vanyel finds the scanner protocol a bit more stressful, but can hold still for the required duration. 

"Old fashioned scanners took way longer. Though they didn't make you hold your breath since it would have been impossible."

"That must not have been ideal for the scans." 

When his is done too, Vanyel climbs out and joins them to look at his brain. 

"It was not! These are better." Are these brains like each other and unlike normal brains in any ways?

They are! The difference seems to be mainly in the sensorimotor cortex; there's an additional area that doesn't match anything in a standard human brain. (Vanyel's is bigger, but not otherwise different in kind.) 

It doesn't look like it should interfere with installing a chip, though. 

Cam points out the comparison points and indicates where the chip goes "though I'll still want the infirmary staffer to spot me".

"I can go first," Vanyel offers. "I think it'd be worse if something messed up your brain than mine." 

Leareth gives Vanyel a narrow-eyed look. "No." 

"The infirmary staffer is categorically adequate and if she weren't Leareth would be a safer test because his whatever-that-is is a bit smaller but not by enough that I'd be doing brain surgery on him for a nonemergency convenience."

"Also I am the one who was pushing for a brain computer in the first place." 

"And I think you can have one, but let's go to the infirmary."

In the infirmary, the infirmary lady asks them to show her where they're hurt and Cam sighs and ignores her.

Leareth will follow whatever instructions Cam gives him. Calmly. It's not going to help to be nervous about this, so he isn't. 

Cam hands him an object. "There you go," he says. "It'll give you a tutorial, Milliways'll translate it so the default one should work fine."

"...Did you already do it? That was quick." 

"It's not a large object."