What you’ll need:
pretty paper of cardstock weight OR a combination of plain cardstock and pretty, decorated lighter weight paper
[optional] other decorating tools, such as crayons, markers, stamps, stickers, ink pads, embossing powder, etc.
Let's get crafting
1) On a piece of white cardstock make your template. Using a ruler draw a 2.5 inch x 2.5 inch square. You can go a little bigger, but this makes a very good size. Draw second square exactly the same size on the right side of the first square (so they share a side) and a third square exactly the same size on the top of the first square. You should end up with 3 squares that compose an L shape.
2) Using your ruler, draw a diagonal line across the top left square, from its top right corner to its bottom left corner. Scribble out the upper left half (now a triangle) of the square, as you won’t be using that part.
Next, draw a diagonal line across the bottom right square, from its top right corner to its bottom left corner. Scribble out the lower right half (now a triangle) of this square.
3) Cut out all parts, but your scribbled out triangles. This will be your template.
6.5) [optional] Cut a slightly smaller square than you used for your template from a piece of printed paper. Glue the square into the square portion created by your template.
8) Apply glue to the underside (the side still facing up) of the second triangle, and fold it over onto the first triangle.
8.5) [optional] As in step 6.5, if you’ve used plain cardstock and want to glue a matching top, cut a triangle slightly smaller than the template triangle using the same paper you did for the square.
9) Make your embellishments. We went with teeth and eyes. For the eyes I used my creative memories 1 inch and 3/4 inch circle punches, then freehanded the black pupil.
9.5) The teeth were made by making another 2.5 inch square (or whatever size you made your template square). Draw a diagonal line from one top point to a bottom point. Then freehand zig zags for teeth.
10) Cut out your teeth and put glue onto the triangular portion. Then slip into your bookmark and glue to the top triangle.
I Could Make That has 2 other ways to make corner bookmarks. Stop by her blog and try them out. They are similar to this one, without the monster touch.