https://enjoy-teaching.com/science-videos-for-kids/6-rocks-videos-for-kids/
https://uwaterloo.ca/earth-sciences-museum/resources/just-kids/minerals-kids
https://sciencetrek.org/sciencetrek/topics/rocks_and_minerals/games.cfm
https://geology.com/rocks/
https://geology.com/minerals/
http://jersey.uoregon.edu/~mstrick/MinRockID/RockID/RockIDChart.html