 Each program lasts five days for the Mach I program (9–11 years old), Mach II program (12–14 years old), and the Mach III program (15–18 years old), and a single two week Mach III Elite program offered exclusively to the alumni of the regular Mach III program.The Mach I program is meant for cadets from 9–11 years old which is the youngest age group at Aviation Challenge.“Aviation Challenge® MACH I is a fast-paced, military-style program that uses simulated, realistic combat scenarios.