This rainbow jumper bundle is quite handy for making a color-coded wiring harnesses. It's also suitable for all kinds of 0.1" spacing applications like breadboarding or connecting between headers on PCBs!
Behold, the Hydra! It doesn't have seven heads as you might expect, nor is it even a dragon, but it is a great way to get 5V to your project via 3 separate power connections broken out from a USB-A male connector.
Add a Wii Nunchuck and battery to this bundle and you'll have a simple Joystick and 2 button interface for all kinds of wireless applications. Team this bundle up with a few Synapse Receiver bundles to control multiple high power LEDs!