The man who entertained generations of Chicago children with Chelveston the Duck, Cuddley Duddley and morning turtle races is dead. Ray Rayner, who hosted the morning kid show “Ray Rayner and Friends” on WGN for nearly 20 years, and also played clown Oliver O’Oliver on the Bozo Show, died this morning of pneumonia in a hospital in Fort Myers, Fla., where he had been living in retirement, according to his daughter, Christina Miller. He was 84. Known at one time as the busiest man in Chicago television, during one period in the 1960s, Mr. Rayner performed in three live television...