Marijuana is not a physically addictive drug. The HIGH (my favorite) Use: getting high, let's get high, Practice: This level is generally reached when you smoke a joint or a couple of bowls with friends. Attainment can be reached with 4 to 8 hits of decent weed.
After that first tooth breaks through, more and more teeth begin to appear. Most kids have their first set of teeth by the time they are 3 years old. These are called the primary teeth, baby teeth, or milk teeth and there are 20 in all. When a child gets to age 5 or 6, these teeth start falling out, one by one.
Here is a great diagram that explains when baby teeth erupt/appear in the mouth and when they fall out. Variation in the times by up to 12 months is fairly normal. Usually all of the baby teeth are present in the mouth by age two and there is no change in the number of teeth until age 5 at the earliest, so what your daughter is experiencing is completely normal. FYI here are some factors that can effect dental development (when teeth erupt/are lost):