She grabs it and points out the edges, and how they wrap around.
Emma nods. "Circle!" She can't get the map into a sphere, but she can (carefully) fold it into a cylinder. First in one direction, then the other, to show how it overlaps. It's not the best projection, but it's close enough. "See? Circle."
Emma giggles. "My world-" she gestures to encompass the whole map, to explain the world. "not not not your world, I think, yes?"
But also- she feels bad. It really is a very different world. She wants to be welcoming, on behalf of her world, or something?
"Sorry," she says. "I know you sad, want your world. I just- I know, your world good, but I want you think my world good also."
They hadn't actually gotten to 'also', yet, but hopefully it's reasonably obvious in context. Maybe.
"Um -" Crystal taps the books. "Book. Person Book. Crystal's and Holly's -" She's missing the word.
Oh! "Name," Emma supplies. "Emma my name, Crystal and Holly your names. Book person's name?" She recalls vaguely that she was missing a word. "Friend?" she tries. "Alli, Jenny, my friends."
"...Book with Crystal and Holly," tries Crystal. "Book go with Fwaysyee... Fwaysyee friend. Book..."
If they shared a body, that narrows down relationship choices. Hmm. She digs a family tree out of somewhere or another and starts naming various relationship types.
"Book brother," says Crystal decisively, when supplied with the words. "Holly and Crystal sister sister, Book brother."
Awwww. That's just sad, they left their brother behind and they don't know what happened to him. "Sorry," she says helplessly. "I hope- um, think/want?- him good."
"Book asleep, Fwaysyee awake, tlaa eat Crystal and Holly," sighs Crystal. "Tlaa eat Holly and Crystal go here. Tlaa eat Fwaysyee and Book - go -?"
Looking on the bright side! She's not sure what else to do, here, really.
"Not eat, not - no tlaa eat Crystal and Holly here, not go Kuigao. Not see. Eat, go - here, not here -"
"Um..." Emma attempts to parse this. "We go- not now, more day go- search Chialto, see Book, no Book?"
(Who will then trail behind them lazily, chatting up his many lady friends in the markets. He doesn't ever fall far enough behind Emma to make her feel unsafe, and she enjoys the safety-without-strictness feeling, so she doesn't bother him about it, and he appreciates the time off, and really everyone wins. Emma's never understood why a male stable hand counts as a chaperone, but she supposes she usually has a friend or a maid with her as well.)
But unfortunately, this all takes time. Time for her mother to come home, for her to finish her language lessons for the day, for her friends to get off work and get her note and come over, to get permission from her mother and the company of the 'bodyguard' and to go out into Chialto.
So in the meantime- would Holly like to learn some new words? Because Emma is a language nerd with very few bright ideas for activities, when they can't leave the house and are actively hiding from the other residents.
Though Crystal is the one with the tolerance to make their notes about them.
Well, then Emma is going to try to get slightly fancier with words. There might even be verb tenses.
While she's at it, she tries to throw in related time words. Things like "tomorrow", "today", "now", that sort of thing. So she doesn't have to just... hand wave how long they have to wait before they can go into the city.