You take a picture of each student wearing a detective hat and a trenchcoat with a badge. The printed page read, "Just the Facts About (insert student name)." The children then wrote interesting facts about themselves on the paper. Mount each onto brown cardstock, round the corners and use aluminum foil to make them look like clipboards.
Light towers made out of air filters. Could be done with a PVC frame and using wax paper, or one of those giant rolls of butcher's paper that schools use. Looks like they used a par can for lighting, but RGBA LED would be sweet so you could strobe colors or even do some pulse effects .
Evidence Vault Door for Agency D3 Bible Study Room. It's made from insulation board and attaches to the front of the door along the door jam. The side is scored and turned under to attach right up beside the outside door jam. It works great! Lock is paper towel holders attached to a Chinese take-out bowl. The paper towel roll is also the handle. The ends of the rolls are medicine caps painted silver. They fit perfectly!