FLASHBACK: The joys of the Flexible Flyer.
UPDATE: Reader Byron Matthews shares a memory of the wheeled version, the Flexy-Racer. I had a nasty accident on one of these when I was four, going down a steep concrete driveway. Serious road-rash; the scars on my knees and elbows are still barely visible today if you know where to look. And I do. . . .