Projects are largely hands-on because young children create best when building, shaping, molding, cutting, scraping and pasting. They are sensory motivated and need to experience each project using all 5 senses.
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Then, they explored faces by drawing each other using different mediums of their choice.
And then made self portrait paper collages.
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In another project, students read books about transportation. They learned about cars, planes, trains and bicycles; how they move and how they are driven. Then, students created roads with a city backdrop (because that's what it looks like when they drive with their families around town).
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Students learned about landscapes by drawing their houses....
So much of art is derived from one person's interaction and perception of the world. It's no different for young children.