So I thought having a pinboard to put his current art/learning works on would be a good idea.
I had an old mirror frame that broke during our first big wind in our last town. I'd previously painted the back board and put little photos of my friends and family on it but I thought it was time for a change.
I had bought a roll of cork from the local cheap shop but when I unrolled it, I discovered it was very thin so I cut out a bit of a moving box (smaller than the frame backing) so that when we put pins in they have a bit more depth to hang onto.
So I laid the cork down, then the cardboard, then the backing sheet and carefully pulled the cork tight (turns out cheap cork is very thin and breaks easily), securing it with a staple gun.
I stapled all the way around, folding the corners in nicely.
Unfortunately when I went to put it back in the frame, the cork folds on the corners made it too tight to fit!!! Gah! So I had to take the corner staples out, remove the extra layers from the corner folds (just tearing them out worked), and re-staple. Ta da! With a little squishing it fit in nicely!