John Krieger, a former science teacher, is a strong supporter of STEM in the classroom and science in the real world. Bollards at Laguna Nigel in southern California might offer the opportunity to teach a bit of astronomy. 

John says, "I don’t mean to imply that every concrete curb stop should be turned into an astronomical instrument. But why can’t we have more of these things around us? The ‘globe sundial’ is not an original idea of mine. People have actually made them, but they are depressingly rare....Sometimes someone does go to the trouble of making a beautiful, scientifically literate public display, and places it in full view of the everyday public, and even provides instructions..." Many of these public displays are sundials and during John's career, he developed aids to teach astronomy to schoolchildren. At his website, he makes an array of paper sundials, globes, astrolabes and quadrants available in PDF form for printing and easy constructing to make an accurate sundial or globe with explanation of how it works. "Most of them are printable PDF files that you can download and give to kids to label, cut out, and use as the basis of some activity... Officially, I am making all of these works available under a Creative Commons — Attribution License, which means you may do anything you like with them, as long as you give me credit as the creator."

And don't worry about adjusting for latitude. His paper instruments are available for download at every 10 degrees of latitude from 60 deg south to 60 deg north, which for example would be appropriate for use in Reykjavik, Iceland. In North America, 20 degrees covers lower Florida, 30 degrees is suitable for southern California, 40 degrees works for the big US east coast cities, and 50 degrees is appropriate for Calgary in the heart of Alberta.

Downloads available at: https://www.astronomyforthinkers.com/downloads/

For the Hemispherical Dial, go to: https://www.instructables.com/A-Hemispherical-Paper-Sundial/