I gave a smashbook to my 10yr old dgd and she went wild. Stickers, papers, photos, coloring things, ribbons, etc. Anything & everything. When I gave it to her, she asked what to do and I told her to do anything she wanted. Write it, scribble, whatever. There is no wrong or right. She's done that one and another on their 2 wk vacation is summer and now she's on a 3rd one.
Absolutely the greatest way for kids too to get creative!