Two very stupid children called Chrystal and Sandy find a mysterious map that directs them into a dark, dank cave containing their worst nightmare: a punk-rock geologist bandleader called Micah who starts them on a magical musical journey to learn more about rocks and minerals. This journey includes many terrifying rock creatures in terrible costumes, more caves, more musical numbers and many interesting(?) facts about rocks!

https://youtu.be/s8BUc4zEUyw