Cut foam so that it fits the magnifying glass and is able to hold the translucent paper and flashlight perpendicularly. You should cut it slightly bigger than the objects themselves if you want to have the ability to remove them and put them back easily. A tighter cut will make it harder to remove and put back in.
Glue the foam pieces on the main foam and wait a few minutes to dry.
Place the magnifying glass, flashlight, and translucent paper in place.
Turn on the flashlight and viola! You should be seeing the images/text you wrote on the translucent paper.