In the past few years, we have covered plenty of geeky keyboards and input devices here. The BT5 FunMouse AG1 Mouse is also worth a look. It is a RGB LED mouse with interchangeable magnetic action figures. You can also display a tiny picture frame on it.
This 6-button mouse has adjustable DPI of 400 to 6200. It has an ergonomic design and 4 RGB modes. You can find out more about it here.