HCR Update from Mark Sanna: Shopping carts might not seem like a particularly dangerous place for a child, but from 1990 to 2011, an average of 66 children a day wound up in emergency rooms after injuries sustained in and near them. In the 22 years covered by the study, about 16,500 children were injured seriously enough to be admitted to a hospital. Most of the injured were children under 4 who fell out of a cart, and more than 90% of their wounds were to the head.