Meet and greet; discover motivation, mindset and what they want to get out of the trip. Brief (with the family/mates) the primary EoC using a model, explain the importance of attitudes and lookout and give a quick outline of the trip (no writing or white boards). Discuss effects of g if appropriate.
Walk out discussing a few aircraft details. Strap-in, explain harness and door/canopy catches.
Once away from dispersal discuss handover/takeover of control and get them taxiing. Consider getting them to fly the take-off (if tricycle).
Demo primary EoC and attitude in climb then get them to fly the climb.
Level-off, demo attitude and get them to fly to their house or some famous local feature (in the process they learn how to turn).
The next bit depends on motivation and length of trip but would normally include trimming.
Then get them to fly back to the airfield.
After shutdown answer any questions and invite kids into cockpit.
Above all build a relationship and make the trip fun, exciting and emphasise that the basics are easy to learn.
HFD