Berit likes to draw on many kinds of stuff with many kinds of media, and he said it's hard to find gray cardboard for highlighters, which tend to be too bright on any white paper. Berit's problem was about not having enough gray cardboard to draw on, when I realized I have way too many empty cereal boxes lying around. I have no idea if they are suitable for highlighters, but I wanted to try and bind a sketchbook out of them. Here are the test results! I might bind a bigger one later when I have more time.
If you want to know about japanese binding, see here:
http://youtu.be/j-r6c_trSxYHehe, I think I'll give the book to Berit as a valentine's day gift.