We've always had the kids on delayed shot schedules. It's a decision we made, and it's worked out very well for us, and more importantly, for the kids. Thea had her first immunization this day, and was well aware of what was coming, how, and why. At three, she's old enough to understand getting sick, and why we don't want to. She wore her cape, for extra magic, and extra bravery. When it was time for the actual shot, she took it like a ninja, made of brick walls. "Ouch!", and it was over. Our tough, brave little girl didn't shed a single tear.