If you are going to Chiang Mai be sure to put Art in Paradise on your itinerary. Our family visited in November of 2015 and had so much fun! We spent hours jumping in and out of the art work, taking hundreds of photos.
It costs 300 baht for adults and 200 baht for children under (unfortunately all our kids count as adults now), but it was totally worth it. We went on a Monday morning and it was not crowded at all. Sometimes we were the only people in the room. We never had to wait to get a picture at any of the murals.
Pay attention to where you need to stand to take the picture at each mural or the photo won’t be lined up right. There are marks on the floor to show you. I totally missed this and many of my pictures didn’t turn out right. Look online and check out my photos below for ideas of how to pose in each mural.