Simple Sand Sifter Design Experiment - DIY

In the interest of seeing if there are easy ways to design and build simple Sand Sifters for Beach Clean-ups, we went to the hardware store with the goal of creating sand sifters that can be produced within 5 minutes for less than $15. Below are the results. 
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Simple Sand Sifter Design Experiment, Part 1

Simple Sand Sifter Design Experiment - Part 2: The Beach Environment