Vintage 1970s Dental Instruction Kit Tooth Paste Brush Tablets NOS School. Condition is "New". These were “kits” I remember given to the kids in a classroom in Grammar school in the 1970s to promote dental health. The instructions said the tablets would “turn red” in areas we kids needed to brush more, and we were to wait until we were ready to brush before using them. Of course half the class tried them out 5 minutes after getting the kits and were walking around school with red teeth the rest of the day! Shipped with USPS First Class.