Pieces of cardboard (Leith EH6)

I have a bunch of (clean) cardboard sheets - 3 sizes listed below, at least 30 to 40 of each size. I can see them being useful for an artist wanting to keep prints or paintings flat for posting, or for display. Or potentially for construction projects if you are entertaining kids.
Obviously, I can recycle them but they seem like they should be useful to someone. Preference for someone to take at least a bunch of them away, not one piece at a time. Can be picked up in Leith, Monday to Friday, 10am to 5pm.

Sizes:
17cm x 24cm
17cm x 33cm
26cm x 38cm