Here is a colorful skirt that you can build to put on a show at night. The Sparkle Skirt was built using the Circuit Playground board. It has sound reactive, motion sensing, and rainbow color palette modes. It comes with a 3D printed belt buckle that houses the electronics and 10 reactive lights and button controls.
You are going to need Neopixels, batteries, Circuit Playground, and a few other simple parts to get started. More info is available on Adafruit.com.