About 10,000 infants, most of them younger than four months of age, are treated in US ERs each year because of car seat - related injuries unrelated to car accidents: falling out of a seat because they were not properly strapped in; falling with the seat from an elevated surface such as a kitchen counter; seats
accidentally tipped
over by an adult or older child; older infants wiggling sufficiently — even when properly strapped in — to
topple the seat
over.