I folded over a piece of CS so it was like a mini card. Then, I did open journaling on the top of the card when folded. I opened the card and wrote all my hidden journaling on the inside of the lid and bottom. Then I glued the bottom down to my page and folded the lid back over. When the page protector is on, the open journaling stays visible, and the hidden journaling stays in the card. That way only I can see what's underneath.