Triathlons for children have become tremendously popular, drawing participants as young as 3 (who probably did not come up with the idea themselves).
Some races let children as young as 3 participate, using swim floats, training wheels or even tricycles. “If you want to start a child when they are really young, understand they aren’t doing a whole lot,” said Ms. Osgood, who said that she considered age 8 or 10 a reasonable age to start.
A triathlon “combines three things kids like to do: swim, ride their bikes and run around,”