So, assuming that's Froggy Nun's actual age:

Froggy Nun: 8
Clumsy, Spicy, and Glasses: Somewhere between 9-10 (Clumsy was roughly a year old or so when Froggy was an infant, and when she met Spicy and Glasses they seemed about the same age)
Sheep: Somewhere between 13-14 (she was already past toddlerhood when Froggy was born)