"...Do they?" 

"Your guess is as good as ours. They apparently have gendered dormitories; I predict some awkwardness."

"I'll try my best to help, but I don't think they take Muggles very seriously." 

"That seems silly, not to care what parents think."

"Yes, magical law has... something to be desired... when it comes to its treatment of Muggles."

"Is there a good way to review the law? I didn't see anything in the bookshop."

"I'm not sure, what little I know of it comes from talking to Deputy Headmaster Flitwick."

"I guess I have that to look forward to. Legal research."

"Perhaps we should return to the bookstore to ask."

"Maybe. I don't think we got anything besides plants and required textbooks. Scott, are you okay with heading back?"

He shrugs, and follows the parents. 

Back to Flourish & Botts.

"Have you bought everything, then? Quill and parchment, telescope, ingredients...?"

"Mom, we forgot the telescope!" 

"After the bookstore, and the robes. I'm sure the astronomy supplies are available at night." 

They return to the bookstore. 

There are still many books, and an owner who seems hopeful and then immediately disappointed. 

Do they have anything on law?

There are some books on ancient magical Britain!

The most exciting cases heard by the Wizengamot!

A book about a witch who lived as Muggle for a year!

Not much else.

"Nothing so useful," she sighs.

"This one about the witch might give an idea about the mindset, but not the laws. Probably not worth it. I'll just make a point to ask someone."

"Perhaps our sons should see if they can't find anything related to that in Hogwarts."

"We get a mission? We get a mission!"

He giggles. "We can do that!"

"Alright. Robes, and then Scott and I can double back for the telescope."

And presently: Madam Malkins!

Would they like to experience more Fun With Measurements? 

They'll have to sit through it, at any rate.