Why does the Torah insert the (otherwise superfluous) words "Vayisparku Kol ha'Am ... "?
Yerushalmi Shakalim, 1:1: To draw a contrast between the Mishkan - where the Torah writes that only the "N'div Leiv' (the generous-hearted) donated, and the Eigel, where everybody contributed. 1
Yerushalmi, Ibid.: A fact which should cuse whoever reads it to recoil in horror.
Whose earrings did they bring to Aharon?
Refer to 32:2:1:1.
Rosh (in 35:22): The men took their wives' 1 earrings against their will, as implied by the word "va'Yisparku".
Surely they took also their children's ornaments, since "be'Ozneihem" refers to Aharon's request. Moreover, if they took only from their wives, the Torah would have written 'be'Ozneihen' (PF).