It's one thing to be told something, it's another to interact with something...
“Tell me and I'll forget; show me and I may remember; involve me and I'll understand.”
Through involvement, a solid base of learning is created and fostered. DLKW's campaign to identify the signs of a stroke was visually very stimulating, but I've already forgotten the symptoms. How about a physical artifact to inspire the mind? There's also the added benefit of teaching the young in a medium they'll understand so that they can act if their grandparent ever has a stroke.
On a more random note...everyone likes a red Super Mario bowler hat!