"broken windows" : take frosted contact paper and cut it apart to look like fractured glass. The semi-transparent frosted contact paper takes on the appearance of the "glass" while the actual glass pane (which is transparent) disappears.
Halloween decoration DIY Glowing Eyes: Save finished toilet paper rolls, cut eyes into them. Put glow sticks in the toilet paper rolls. Place the rolls into your hedge, trees or bushes at night. Watch people freak out as they pass your lawn.