I held two sessions on fly fishing today at my son's nursery school. One with the AM group and one with the PM group.
A two minute talk on what trout eat. A look through a fly box. A bit of casting (by me), then allowing them to each hold the rod and reel in. They loved it and who knows what seeds have been planted in a future angler.
Schools are generally pretty keen on parents/grandparents coming in and doing something with the kids. If you get the opportunity, I recommend you take it. Or you could even volunteer/ suggest doing something similar.
It can only be good for the future of our sport.