Bumble Nums

The Bumble Nums Humble, Stumble and Grumble are the main characters of The Bumble Nums.

Bumble Nums usually speak using only the word "Yum" but may sometimes use other words. In the episode Ultimate Upside Down Cake, the Bumble Nums visit Upside-Down Town where the residents (called Bumble Hums by the Narrator) instead only use the word "Hum".