'Cutting them'? For even as cutely and innocently as she says it, the exact phrasing does sound strange to Eliot. She's young though. There's a high probability of simply being inept with the usage of the word.

"Not when they're high up. They'd be too far away for that. Have you not seen fireworks before? I can make smalls ones that don't really burn either, but I'm not sure they'd show well in this place."