Blessed be the Place [of all], Blessed be He; Blessed be the One who Gave the Torah to His people Israel, Blessed be He. Corresponding to four sons did the Torah speak; one [who is] wise, one [who is] evil, one who is innocent and one who doesn't know to ask.
What does the wise [son] say? "'What are these testimonies, statutes and judgments that the Lord our God commanded you?' (Deuteronomy 6:20)" And accordingly you will say to him, as per the laws of the Pesach sacrifice, "We may not eat an afikoman [a dessert or other foods eaten after the meal] after [we are finished eating] the Pesach sacrifice (Mishnah Pesachim 10:8)."
What does the evil [son] say? "'What is this worship to you?' (Exodus 12:26)" 'To you' and not 'to him.' And since he excluded himself from the collective, he denied a principle [of the Jewish faith]. And accordingly, you will blunt his teeth and say to him, "'For the sake of this, did the Lord do [this] for me in my going out of Egypt' (Exodus 13:8)." 'For me' and not 'for him.' If he had been there, he would not have been saved.
What does the innocent [son] say? "'What is this?' (Exodus 13:14)" And you will say to him, "'With the strength of [His] hand did the Lord take us out from Egypt, from the house of slaves' (Exodus 13:14).'"
And [regarding] the one who doesn't know to ask, you will open [the conversation] for him. As it is stated (Exodus 13:8), "And you will speak to your son on that day saying, for the sake of this, did the Lord do [this] for me in my going out of Egypt."