TODAY I HAVE BEEN MAKING AN ALTERED ART BOOK, IT STARTED OF YELLOW AND I PUT SOME BROWN ACRYLIC PAINT ON A TISSUE AND RUBBED IT OVER THE BOOK COVER TO GIVE A AGED LOOK. THE I CUT A DOOR SHAPE OUT OF THE FRONT USING A STANLEY KNIFE AND A RULER. AFTER SANDING THE LITTLE DOOR EDGES AND THE FRAME I ADDED A HINGE AND BY USING SOME PAPER CLIPS PUSHED THROUGH THE WHOLES ITS SAFE AND SECURE! IM HALF WAY THROUGH IT AT THE  MOMENT BUT AM NOT SURE WHAT TO PUT IN THE MIDLE, ANY IDEAS ANYONE? HELP!