Play dough for plaque...YUCK! On a side note, if you keep the play dough in the blocks overnight, it will harden. This could also be a GREAT lesson to teach how food left in between your teeth will turn into plaque and harden over time...which is why we need to floss on a DAILY basis!
These teeth definitely need some brushing! Take some laminated tooth shapes and draw "sugar bugs" on them with a dry erase marker. Give the children a tooth brush and let them "brush" the teeth clean! keep scrolling down if you want to see exactly what she did!