Here is a cool sweater that you can display an animated snowflake and control it from your smartphone. The Bluetooth Snowflake Sweater was made using a flexible 8×8 NeoPixel matrix, Bluefruit, battery, and other parts. You can control the animation and color using the Adafruit Bluefruit LE Connect app for iOS or Android.
The above video provides more information about this project. More information is available on Adafruit’s website.