Princess Purl Day.

It's the Princess Purl Day parade in Craft City. Bitz is driving the royal carriage while Purl waves at all the crowds and Bob acts as a tour guide. But disaster strikes when the brake jams! When Bitz tries to fix it, it snaps off in her hand and the carriage zooms off, out of control, with Bob and Princess Purl still onboard. Bitz needs to think of a way of stopping it - and fast.