I think it would be a neat extension to make boxes to hold the book treasures.
Pages that have been removed from the original book could be used to
collage the outside of the box. Box can be made from corrugated
cardboard. I would suggest covering box with a layer wide masking tape
first so it doesn't warp when you collage it. I think I will make one
for my Tip In book. I will be offering more Tip In swaps over the
years... and adding more pages to my book. MyBook is all about your