Dr. Bill and Elsie Jean Platypus

Dr. Bill Platypus, his wife Elsie Jean Platypus, and their daughter Ana Platypus were a family of duck-billed platypuses who lived in the platypus mound. They were introduced in season two of the series.

Grandpere Tiger

Grandpere lived in the Eiffel Tower in the Neighborhood of Make-Believe. He enjoyed teaching the other puppets French words. His granddaughter Collette would occasionally visit him in the Neighborhood and caused much jealousy due to her beauty. Grandpere allowed Dr. Bill Platypus to have an office in the Eiffel Tower.

Cornflake “Corny” S. Pecially

Fred Rogers voiced the beaver-like character of Cornflake, who owned a factory that specialized in rocking chair production. Corny was one of the first puppets to appear on the precursor to “Mister Rogers’ Neighborhood”—“Misterogers”—which aired in Canada.