Pandering to the big kid in all of us
We used to encourage kids up to the range for a shoot, The district school where our beach place is would send kids and their parents over there along with kids from the local scout and girl guide groups.
Kids love things that go bang when they get hit. I was looking for a project one sunday at home when I noticed I had a drill bit the same diameter as a 12 gauge shot gun cartridge. I drilled some holes in a piece of old wooden fence post and while the holes would allow the body of the cartridge to pass through it wouldn't allow the rim to enter the hole. The idea was to put the kids back at 50 yards and allow them to hit the primers of the shotgun shells with the .22 and 17hm2. this turned out to be the most popular event for them.