THIS STORY WAS TOLD TO THEM(BY THEIR GRANDMOTHER) WHEN THEY VISITED HER LAST WEEK

3. - GIÁN ÁN BAI TAP VE CHUYEN DE BI DONG(CO DAP AN)
GIÁN ÁN BAI TAP VE CHUYEN DE BI DONG(CO DAP AN)

3.This story was told to them(by their grandmother) when they visited her last week.