Encouraging learners of all ages to experience solar eclipses safely is one of NASA's main priorities and goals during these beautiful and awe-inspiring celestial events. Besides ISO certified solar viewing glasses and other direct viewing methods, a pinhole projector is a safe, fun, and educational tool for observers of all ages to use. The NASA Heliophysics Education Activation Team (NASA HEAT) has developed and made available 2D and 3D pinhole projector files in the shape of the continental U.S. map and a companion activity with a math extension.
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Sasser et al. (2024) studied this question.
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