The hagada tells us that in every generation, a person must see himself as if he had personally gone out of Egypt.  If so, why didn't our Sages suggest how to visualize or recreate the experience?
 
It is not possible to actually see ourselves as having left slavery. Rather, we should feel our obligation to do the mitzvot (commandments) as the Israelites felt when they left Egypt, as they switched from being slaves to serving Hashem. We can be freed (b'nei chorin) from physical or spiritual slavery.

Rabbi Heinemann's view is that women should not sing zmirot, Hallel, songs in the Hagada, and other prayers with men or when men are present, but he notes that there are other major opinions that say it is permitted.

Each of the four cups has a different role:

• First Cup: Kiddush to sanctify the holiday.
• Second Cup: Sanctifying the hagada.
• Third Cup: Sanctifying Birkat ha'mazon.
• Fourth Cup: Sanctifying Hallel.

Only three of the Four Sons' questions are mentioned in the Torah (which all related to the Passover sacrifice), since the fourth (smallest) child cannot ask questions. Regarding this child, the hagada says, "Aht p'tach lo" (in the feminine).
Reason  The mother is supposed to be a child's primary teacher while the child is young.
There is a difference in attitude between the wise son and the evil son: The wise son says "Eloheinu" (OUR God); he is asking a question and seeking and answer. The evil son makes a statement (sort of a rhetorical question), instead of asking a question for which he seeks an answer. Yet, regardless of the sons' level of observance, it is a commandment to teach them about going out of Egypt.

It is praiseworthy to tell the story of Passover even if you know all the details and interpretations (as did the great rabbis of the Talmud), because of the principle of “in order to remember” (lema'an tizkor): that we should remember everything God did for us when taking us out of Egypt.
The Three Discussion Points
The most important part of the seder is discussing:

• Passover offering (Pesach),
• Unleavened bread (matza), and
• Bitter herbs (maror).

These three segments should be read from the Passover hagada in the Hebrew.  If anyone does not understand the Hebrew, these paragraphs and the concepts they express must be explained in whatever language he or she can understand.
Children at the Seder
Children are an integral part of the seder.  We try to get children to ask questions and then we teach them the answers.  The Torah says to do this!
Acknowledging God's Miracles
We acknowledge God's miracles in sending the plagues against the Egyptians and their gods and in taking the Children of Israel out of slavery and Egypt.
Telling Our History
We tell our history beginning with Jacob (Yaakov) and Laban (Lavan) and on to slavery and, finally, to achieving freedom.