Remember when Little Harry Bailey's sled veered off course and into an ice hole in It's a Wonderful Life? This was not an isolated incident. Turns out more than 33,000 of us are injured while sledding or tobogganing each year, and children ages 5 to 9 are most at risk. Be sure to sled in spacious areas with gently sloping hills and that there's enough room at the end of the ride to stop safely. Also, check for obstructions along your sledding path, such as fences, trees, or rocks, as well as frozen-over ponds and streams.