Looks like you have a good plan. In my experience of teaching kids survival basics the biggest problem was keeping their attention. (Three hours!!! Are you serious?) My little program is 1 to 1 1/2 hours long with the majority of the time having the kids duplicate most of the survival techeniques they had just watched in Ron Hood's Survival Basics I and/or Survival Basics II. Video's. My approach was to really hammer on the ABSOLUTE BASICS of a debris shelter, fire, water, signal. I happen to agree with the camp that states you are much better off to completely forget about food for the first 72 hours. I also teach very basic survival tools in their pockets or maybe a waist pack; things that kids are more likely to actually do rather than perfect emergency kit.