The Lost Crystals
In this volume, Volta discovers some strange crystals with liquid in them. He goes back to the Learning Beach to show his friends and they learn more about liquid crystals.
The complete Volume 10 code on GitHub
Below are the links to the various videos and references from the Daily Parrot's interview with Randy Elwin.
The RadioShack 101 Electronic Kit
Randy's Pinball Machine
More about the NE555 Contest