One morning the wide-mouthed frog decided to take a walk to see the world and enhance his education. As he hopped through the meadow by the pond he came upon a cow. He hopped over to the cow and said:
HELLO MRS. COW, I'M THE WIDE-MOUTHED FROG, TELL ME WHAT DO YOU FEED YOUR BAAABIES.
The cow replied: "I feed my babies milk."
Frog: OOOOOHHH
The frog hopped further into the meadow and came upon a bird pecking in the grass. He hopped over to the bird and said:
HELLO MRS. BIRD, I'M THE WIDE-MOUTHED FROG, TELL ME WHAT DO YOU FEED YOUR BAAABIES.
The bird replied: "I feed my babies worms."
Frog: OOOOOHHH
The frog hopped further into the meadow and came upon a horse-eating grass. He hopped over to the horse and said:
HELLO MRS. HORSE, I'M THE WIDE-MOUTHED FROG, TELL ME WHAT DO YOU FEED YOUR BAAABIES.
The horse replied: "I feed my babies wide-mouthed frogs."
Frog: oh
This works best when the person doing the frog part has a large mouth and really hams up the questions and the OOOHHH responses, opening the mouth widely while speaking. The final "oh" is done with the mouth barely open and the voice barely loud enough to be heard by the audience.