A childhood belief about speaking

The first time I ever heard of doing somersaults, I guess it was summer, and I thought somersaults were so called because someone was doing them in the summer. I supposed that if someone did the same thing in the winter, it would be a wintersault. As time went on and I never heard of wintersaults (or springsaults or autumnsaults either, for that matter), I assumed that there was some reason why somersaults were most likely to be done in the summer, hence the name. It seemed to make sense to the extent that summer is associated with outdoor activities, and I'd seen somersaults done primarily outdoors, probably because few people I knew would have had ample room to do them inside their houses.