1. I can't see any pieces

2. I can see the pieces but can't imagine putting them together

3. I can put them together in my head with difficulty

4. I can put them together easily, but details are blurry or missing, such as color

5. I can put them together and see some details (colors and the connections between parts, and the lines that separate them)

6. I can put them together and can see extremely fine details (serial numbers and such)