Select a colour for your monster and take a square paper of that colour. Place the paper diagonally. 

Fold the paper in half by bringing the top point downwards over the bottom point. 

That will create a triangular shape. 

Now take one flap from the middle.point.of the triangle and bring it upwards and fold it there. 

Now.bring the left and right point downwards and fold it there.

Tuck in the both pointed sides into the top pocket we created in

Cut out the eyes for the monster using the templates.

Glue both eyes on the upper side of the bookmark.

Then again use the template to cut out the teeth of the monster.

Glue the teeth slightly inside the pocket, it will make it look neater.

Then once again use the template to cut out the tongue shape for the monster.

Glue the tongue inside the pocket behind the teeth we glued previously.

Now finally cut out the eyebrows and glue them on the top of the eyed to finish off the monster bookmark.