Yesterday, our Cub Scout pack turned out a week in advance of the solar eclipse to learn about science and safety. We also worked on requirements for their 2017 eclipse patch.
The lesson was structured as a “reverse quiz”. The attendees asked canned questions found on randomly drawn slips of paper. Our eccentric instructor answered as best he could. I think he might have been sneaking peeks at his notes. Nobody can keep that much eclipse info in their head at once.
These pictures were frame captures from video taken by the scouts.
I used holes from a push pin. You might try something bigger. Maybe a bunch of different sizes to see what works best