American Girl (and doll names, such as Felicity) are registered trademarks
of American Girl LLC. Mattel Toys markets the products and bought the Pleasant Company, which launched the American Girl brand.
I taught "American Girl Historic Doll Camp" for little girls aged 8 to 10, and charged the families $250/week/girl. I want to write a blog about what we did in this educational experience. May I use the trademarked names, American Girl and the doll names in the title and contents of my blog if I refer to them with "r with a circle around it" and acknowledge the registered trademarks on my blog? I don't know whether the names being registered means I can't use them, or that I need to acknowledge the ownership.
I may put videos about the copyrighted American Girl doll stories on my blog, and I might charge for downloading these videos, so I would be "riding on the name" this brand has established. I will also be showing the products of American Girl in the videos. The little girl arranged toys to go with each book, and told the stories; they created crafts, made snacks, danced and played with the dolls. There is educational value in what they did, but I plan to profit from selling videos about "AG Historic Doll Camp" if this can be done legally. Thank you.