The (Fab) Fours of Pesach: THE FOUR SONS (CHILDREN) with thanks to Ari Elias-Bachrach

(20) When your son asks you in time to come: ‘What is the meaning of the laws, statutes, and ordinances which A-donai our G-d has commanded [us*] // you (pl)?"

(21) then you shall say to your son: ‘We were slaves to Pharaoh in Egypt; and G-d brought us out of Egypt with a mighty hand. (22) G-d showed signs and wonders, great and terrible, upon Egypt, upon Pharaoh, and upon all his house, before our eyes. (23) And G-d brought us out from there, in order to bring us in, to give us the land which G-d swore to our ancestors.

*a different version of Deuteronomy said:

"...which A-donai our G-d has commanded us"

(25) And it shall come to pass, when you come to the land G-d will give you, as promised, that you shall keep this service. (26) And it shall come to pass, when your children shall say to you: What do you (pl) mean by this service? (27) that you shall say: It is the sacrifice of G-d's Passover, for G-d passed over the houses of the children of Israel in Egypt when G-d smote the Egyptians, but delivered our houses.’...

(13) And every firstborn of a donkey you shall redeem with a lamb...but all the first-born of man among your sons you shall redeem. (14) And when your son asks you in time to come, saying: What is this? that you shall say to him: By strength of hand G-d brought us out from Egypt, from the house of bondage; (15) and it came to pass, when Pharaoh would hardly let us go that G-d slew all the firstborn in the land of Egypt, both the first-born of man, and the first-born of beast; therefore I sacrifice to G-d all the firstborn male [beasts]; but all the first-born of my sons I redeem.

(7) Unleavened bread shall be eaten throughout the seven days but no leavened bread nor leaven shall be seen with you in all your borders. (8) And you shall tell your son in that day: It is because of what G-d did for me when I came forth out of Egypt.