Wheels on the Line

Click! A sudden warmth buzzed right through my boiler. I blinked, looking down at the pale wooden rails beneath me. Could I really do it? I leaned forward with all my might—and rolled! Just an inch, but it was smooth and true! My round metal front gave a tiny, cheerful tap against the gentle curve of the grooved wood. I can roll all on my own! Ready for whatever comes next, right on schedule!