Growing Artificial Geodes from Alum

I had the privilege of attending a course at the UK National Science Learning Centre on Wednesday and Thursday this week.  The focus of my training was in using the Raspberry Pi in key stage three science lessons (11-14 year olds).  In particular, we were looking at using a Pi Camera to film time-lapse and slow-motion video.

Here is a movie I put together showing a project we did on growing Artificial Geodes using Alum in an egg-shell.  If you are still wondering what a geode is, take a look here:

and my video, giving instructions, showing the crystals growing, the end result and the setup is here:


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