[ From the sound of it, perhaps the world Zelda came from is not quite as scientifically advanced as his own. No space exploration, or study of the cosmos. When she says it feels like there's so much she doesn't know, Cisco holds up a finger, a gesture asking her to wait. He starts looking through the piles of books, pulling out five textbooks - the ones that had proven the most useful for him in catching up. He stacks them together and then slides them over towards Zelda, saying: ]

These'll help. Take 'em. Worst case scenario, you can use them for reference when you come across something confusing. Also, uh, I don't know what level of tech you were used to, where you come from, but I feel like I should mention I give lessons. For people who show up here and aren't used to phones, or computers, or whatever. I had flyers up all around the city, a few months back, but now people mostly find me via word of mouth. Here.

[ He fishes around in the pockets of his jacket and, lo and behold, he did have a couple business cards stashed away in one of them. Cisco tucks one into the front of the textbook on the top of the pile, tapping it and saying: ]

That's got the address of my workshop on it, you can stop by most days and I'm usually there, and I can help you with pretty much whatever tech stuff you need to figure out.

[ When he sees her enjoying the spinner, Cisco smiles, gesturing as he says: ]

Keep it. Seriously, I got so many of these.