The Wise Child Eager and earnest.

"Tatah, teach me everything about Pesach...all the laws, the customs, the rituals...everything! I want to learn it all!"

The Wicked Child Glaring at the leader. He is angry and full of contempt.

"Dachau, Mumbai, terrorism, murder. What good have all your pious prayers done you?! To hell with your ritual, and to hell with you!"

The Simple Child Curious and perhaps a bit confused.

" Tatah, what does it mean?"

(Tatah responds:)

"Come, sit with us and I'll explain it to you."

The Child Who Doesn't Know How to Ask Walks over to the leader and gives a hug. 

The leader continues the seder.