According to the British Dental Association, there are deciduous molars, all of which eventually fall out by around age 12, and permanent molars, which do not necessarily fall out. All the deciduous molars appear by the time a child is around 2 1/2 years old.
Mascara: Get yourself a pre-wash stain fighter like Shout and apply to the stain using the brush that comes with the pre-wash. Let it sit for about 10-15 minutes, then rinse with hot water. Launder the garment immediately either by hand or in the machine (whichever is most convenient for you).
Since that is probably the heaviest traveled chunk of carpeting in my apartment, I have accidentally added to those original dark stains. But I could never get them out with the carpet cleaner I bought at Target. So I didn't have much hope for the post on Pinterest saying that baking soda, dish washing liquid and vinegar would get the stains out. The post says to sprinkle baking soda on the stain and let it absorb, then vacuum it up, but since my stains were so old I kept the baking soda on the spot to add to the power of the mixture. Then combine a tablespoon of clear dish washing liquid, a tablespoon of white vinegar and two cups of warm water.