Hi Aragorn
We have a "Sunspotter" projection solar scope, which we put to good use during the Venus transit.
I had the same reservations as you about direct solar observing. That was until the first time I had a look through a filtered scope, now I'm hooked.
The detail of a big sun spot is awesome
However for school presentation i prefer to use the "Sunspotter" as it does not give the wrong idea, especially to younger kids.
The attached picture says it all