Adafruit customer Lahmib designed a claw prop that he wanted to light with LEDs. He turned to the forums for assistance (there are awesome people there happy to help you out with your questions) in configuring the prop — he wanted to have 12 LED lights in an in-line circuit. The glove is hollow with an internal handle, and he wanted the power switch to be on that handle. He knew he needed a switch, a power supply, and resistors and asked for a parts list. He used the advice and constructed the claw pictured above. Based on the initial sketch, the bright white LEDs make the white parts of the glove glow.
You can read more about the project in the forums.