Feeling faces are great for little ones that have a hard time finding the right word to describe their emotions. It works great with a feeling journal to help them learn what the feeling is and what the facial features might be in each situation.
Lackadaisy Expressions by *tracyjb on deviantART for drawing. This remains one of the best depictions of expressive drawing I've seen. A really great tutorial on how to draw facial expressions, and especially wonderful if you need to draw cartoon animals.
Hiccup's face.. XD < Hiccup seriously has the best facial expressions. :)