Jane is - reluctantly - learning to ride her bike without using the training wheels. Her sisters have offered varying levels of support for this endeavor.
Margot: "Janie, when you can ride a two-wheeler, it will be so great. You can coast down hills and it's so fun - a little bit like riding a roller coaster!"
Jane: "Really?"
Claire: "Yes. It's exactly like riding a roller coaster. A fast, terrifying roller coaster that you can't control."