On which magnetic designs are made? (7,5)
I believe the answer is:
drawing board
I'm afraid I can't explain this answer.
Can you help me to learn more?
(Other definitions for drawing board that I've seen before include "Something to go back to when stuck" , "Back to it, for complete rethink" , "Flat draughtsman's surface (often gone back to)" , "Planning stage of project" , "One may have to go back to it" .)