My Blog post here for further help and advice - http://richrap.blogspot.co.uk/2016/06/project-snowflake-this-project-started.html You will need to print 30 of the 3D Model segments, they fit together without the need for glue. We used a Strip of waterproof WS2811 LED's from China - 50 are around $20US or less they are the 12mm type, and will snap-fit into the 3D printed modules. A small Arduino board is also required. Attached is a project file to get the LED's to dance. It's based on the Awesome adafruit Neopixel libraries and sample code. A 12v or 5 v power supply of around 2 Amps (voltage depends on what type of LED's you order) And do make sure to check out the essential Neopixel Uberguide on the adafruit website here - https://learn.adafruit.com/adafruit-neopixel-uberguide/overview