Silicon Valley Kid's Triathlon - http://www.svtriclub.org/svkt/ Offering various distances for boys and girls in age groups 8 and under, 9-10, 11-12, and 13-14 years old.
Little Dreams Foundation: Track and Field - Triathlon - http://www.littledreamsfoundation.com/new/en/worlds/tracknfield/triathlon/intro.htm Introduces some of the greats of the sport and identifies skills kids must develop in order to participate in this event.