This instructable shows how to wire up one or more LED's in a in a basic and clear way. Never done any work before with LED's and don't know how to use them? Its ok, neither have I.
"LED's come in different sizes, brightnesses, voltages, colors and beam patterns, but the selection at Radioshack is pretty small and so I just picked up a couple different LED's from what they had in a few different brightnesses and voltages. I kept close track of what LED was what voltage because I didn't want to accidentally send too much current through one of the low voltage LED's."