Based on Volleyball age Categories, generally the age groups are as follows: 
13U: Athletes born on September 1, 2010- to December 31, 2012.

The focus of the 13U Program is to introduce and develop skills that can be performed under easy and stable conditions where athletes can both build and demonstrate consistency, control, and precision. The goal in these age groups is to start to develop the ability to maintain these skills when the athlete is under pressure, conditions change, or demands increase. The 6 vs 6 game is also introduced creating the need to learn team systems and position specialization. (LTAD, Volleyball Canada)

In an effort to incorporate Long Term Athlete Development (LTAD), Volleyball Nova Scotia will make Tripleball the official competition format for all 13U events. The main catalyst for Volleyball Nova Scotia’s recommendation of Tripleball is the increased probability of creating a rally. Building up rallies and experiencing success early on is an integral part of learning and enjoying the game of volleyball. For more information please see http://volleyballnovascotia.ca/page.php?page_id=72143