Angel Art Creations, located in Oregon City, is an amazing place. I really don't know of anything similar in the area for both kids and adults. The kid classes begin at age 4 and go up to 11, and the adult classes start at 12 years old. Amelia has taken a few of the painting classes and loved each one! I really think she would take every single one if it didn't conflict with her dance class. The owner, Shawna, is amazing and she really takes her time with the kids to make sure they are happy with their work, that they are able to keep up and most importantly... that they are having fun! It is so wonderful to fill our walls with such beautiful pieces that were created by our child.
If you are in the area I highly recommend this place!!! I'm anxious to try an adult class myself.