CHICAGO (AP) — Tricycles might seem pretty tame but they send thousands of kids to emergency rooms each year and are even linked to a handful of deaths, new research shows. Here are three things to know about tricycle risks: THE NUMBERS More than 9,000 tricycle-related injuries were treated in U.S. emergency rooms in 2012 and 2013, or nearly 5,000 each year, according to the study by researchers at Medical College of Georgia and Emory University. Scant previous research on the topic prompted the study, which involved an analysis of data in a national injury surveillance system.