The following web page (courtesy of World Union of Jewish Students)
provides various thoughts [ >from Mishnah (Pirkei) Avot to HaPardes
(20th Century) ], on the age associated with performance of Mitzvot
for boys and girls.

<http://www.wujs.org.il/activist/programmes/sources/life_cycle/bar_and_bat_mitzvah.shtml>
[or http://tinyurl.com/kdf9e --Mod.]

Note: The quotation >from Mishnah Avot is >from Chapter 5, Verse 24,
not 21.

Howard Orenstein
horenstein@...
Westminster, MD