and new research shows window falls are not limited to big cities with big apartment buildings. while 6.5% of kids who fell were three stories or more above ground, nearly 31% of the kids fell from one-story windows, and nearly 63% fell from two stories. single-family homes are very often the scene of window falls. >> many of these children, about half, had injuries to the head or face. >> reporter: of the 5,200 kids who fall out of windows every year, the vast majority are boys 5 years old or younger. children 4 and under are most likely to sustain head injuries, be hospitalized, or die of their injuries. experts urge parents to install window stops to prevent kids from raising the window and window guards if the window is left open. >> they allow the window to be open for the cool breeze to come in, but the children can't fall out. ba >> reporter: back in washington daniel spent a month in the hospital and years in therapy. today he's 10 and david is 13.