3D Nightmare Before Christmas Puzzle

This is a 500 piece 3D Lenticular puzzle of the Nightmare Before Christmas. I would disagree with the age recommendation of 6+. I am 62 years old and it was not a quick puzzle. It took me about 6 hours total to put together. I got it new for Christmas, but there are 5 pieces that appear to have tiny dots of glue on them. It doesn't detract from the picture, but wanted to mention it. I tried to show it in a picture, but not very clear. Measurements are in the pictures.