How good are your Beavers at cleaning their teeth?
Beaver's own toothbrush & toothpaste.
Chocolate buttons (check for allergies).
Challenge them to suck a chocolate button (the easy bit!) then...
Have a really good look at each other's teeth (the yucky bit!) then ...
Give them a proper brush to remove ALL traces of chocolate (the hard bit!) Talk about brushing for 2 minutes, twice a day, especially in all the hard to reach places.
Get them to inspect a partner's attempt & mark them out of 10.