Passover is meant to be loud, joyous and fun. Singing many songs is a way to get into that ruach (spirit). Ariel (and anyone else who knows the melody) teaches it to all at the table. 

.הִנֵּה מַה טוֹב וּמַה נָּעִים שֶׁבֶת אָחִים גַּם יַחַד

Hine(y) ma tov u'ma-nayim

Shevet ach-im gam ya-chad. 

How good and pleasant it is for siblings to be here together. 


haggadah Section: Kadesh