Use a long box or tube and other common materials to create a safe way to view the Sun.
2017 Solar Eclipse Guide
3D STL Files
What is a Solar Eclipse? - Space Place in a Snap!
Solar Eclipse 101 | National Geographic
Solar and lunar eclipses
Eclipses: Crash Course Astronomy
[Suggest a book]
When the Sun Goes Dark, by Andrew Fraknoi and Dennis Schatz
Eclipse: How the 1919 Solar Eclipse Proved Einstein's Theory of General Relativity by Darcy Pattison
Solar and Lunar Eclipses by Ruth Owen
Solar Eclipses by Daisy Ally