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Signing UpStep 1Materials
General: Scissors, tape( I used black, chrome, and white duct tape), cardboard(preferably thin cereal box kind), rubber bands
Stofen: frosted plastic bowl or tupperware type stuff, knife or something to cut it.
Grid spot: Black straws
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You may be interested to know that the "grid spot" uses the same basic physics (collimation via cylindrical channels) as some kinds of night vision goggles! In particular, see image-intensifier tubes and micro-channel plates.