Just got pointed to this site by the author … MelTells.Com has some online books for kids some of which have a sciency theme to them. All of them seem to have some dental connection, though not all in the same way. I have only looked at the bacteria one and it is not bad. Even though I have not looked at the others, since they are free, I am posting this bit here.
Also see review on ByteSizeBiology here
