Here's a link to the halloween costumes we made for our kids. http://www.youtube.com/watch?v=9LzzHAldR5U
They had matching cloud costumes (a trinket, some neopixels/ws2811's, a super simple rf radio and a USB battery). My wife had an umbrella with neopixels playing raindrop animations. I couldn't use the trinket since I used 112 lights.
The code for the umbrella uses AdaFruit's NeoPixel library and is posted here: https://github.com/zekekoch/Raindrops
I'll post the clouds (which use the FastSPI library) later. I'm having a little git issue that I need to sort out.