Flexible 16x16 NeoPixel RGB LED Matrix : ID 2547 : $94.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: BTF-LIGHTING WS2812B ECO RGB Alloy Wires 5050SMD Individual Addressable 16X16 256 Pixels LED Matrix Flexible FPCB Full Color Works with K-1000C,SP107E,etc Controllers Image Video Text Display DC5V : Tools & Home
MAZE RUNNER inspired LED matrix clock (16x16) by AWSW | Download free STL model | Printables.com