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That's pretty much it. This is the result of a kid's book in which a boy goes searching through parallel universes to try and find his dead mother, and there are explanations of Schrodinger's Cat and quantum entanglement along the way.

I am an arts graduate and clueless: the project is supposed to fit into a shoebox. Any help will be much appreciated.

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closed as unclear what you're asking by user36790, David Z Oct 19 '16 at 13:14

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ I'm voting to close this question as off-topic because there is no actual conceptual query in it. $\endgroup$ – user36790 Oct 19 '16 at 13:05
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    $\begingroup$ I think this could be turned into a reasonable conceptual question: does such a demonstration exist, or is quantum mechanics somehow too subtle for a nine-year-old to discover in a shoebox-sized apparatus made of household stuff? However in its current form this may be a list question. $\endgroup$ – rob Oct 19 '16 at 13:22
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    $\begingroup$ One idea: it's pretty easy to build a double-slit interferometer using a laser pointer and a staple or a hair or a microscope slide. If you polarize the light differently on the two sides of the slit, the interference pattern is destroyed. $\endgroup$ – rob Oct 19 '16 at 13:31
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    $\begingroup$ Second idea: with a diffraction grating spectrometer, you can observe discrete emission spectra from lamps and the absorption spectrum of sunlight. The line spectra can't be explained without quantum mechanics. $\endgroup$ – rob Oct 19 '16 at 13:37
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    $\begingroup$ using a laser pointer and a staple or a hair or a microscope slide or a nit comb or pencil leads or... $\endgroup$ – Christoph Oct 19 '16 at 13:43