My personal guesses were as following.

Clumsy, Glasses and Spicy: 10.
Sheep: 13 at best.
Hungry: maybe 14 or 15 (she definitely comes off as the oldest of non-adult nuns).
Pancake: 55 probably (considering the convent was formed 50 years ago, she does not look 8 here.)
Mother Superior: Somewhere in her 60's (she also does not look 20 in that image where Pancake is supposed to be 8).

As for the others, I did not have any guesses, but I (correctly) expected most adult nuns to be in their 20's and Star nun to be in her 30's.

Useful information, thank you Diva!

I always assumed father was in his early 40s. Looks too young to be 52.

Imagine in the future, Clumsy as Mother Superior