INDIANA, (WOWO): McDonald's is recalling 2.3 million Hello Kitty-themed whistle toys given to children in Happy Meals, citing potential chocking hazards.

Two children have reportedly coughed out pieces of the whistle that they had sucked into their mouths, including one child who received medical attention. The U.S. Consumer Product Safety Commission says parts of the three-inch tall “Hello Kitty Birthday Lollipop” whistle can detach and be inhaled, posing a risk to small children.

McDonald's handed out the 2.3 million of these whistles in the U.S. during the past month in Happy Meals and Mighty Kids Meals.