Another idea we stole from Pinterest. The original instructions are HERE.
~This seems like a perfect way to use those old blades, but it's more work. A sharp exacto works much better, but expect to dull the blade quickly.
~It works better to keep the book closed and use the pages that you've already cut as a guide. If you open the book to move the finished pages out of your way, be sure to use the template as your guide. Otherwise, there is a tendency for each layer to get smaller and smaller as you go.
~You can always trim up uneven edges once the basic shape is done. Unless you like the rough, messy look.
~I used a cheap ink pad to color the edges of the pages. I just fanned the closed book slightly and rubbed the ink pad along the edges from both directions. I don't have the patience to wait for paint to dry.
~Books with supple bindings work much better than books that crack apart as you bend them. If you have a small dowel that you can shape the binding around, it helps the pages spread more evenly. The pumpkin in the photo is the only one that we were able to get to look alright.