I remember in elementary school we had a seminar about oral hygiene and we all got some Crest sponsored comic adventures starring four ethnically diverse children and a walking tube of toothpaste with sunglasses where they all TEAMED UP to fight evil plaque and tartar (I think plaque was represented by blobs that looked like Slimer wearing sashes that said "PLAQUE" on them).
Then at the end of the comic book there were activities like "WHICH OF THE FOLLOWING SHOULD YOU FEED THE TEETH?" where there was a list of vegetables and something like cookies that was supposed to be bad.
Man I loved that comic book