Look ma, no microprocessors involved. Make this easy, rather easy. well, easy if you know how to solder and know a little about electronics, firefly jar hacked from a few simple parts.
Wedding favors should express something about capturing the essence of life, both good and bad, happy and sad...
But imagine the poor little critter, back against the wall, suffocating in the jar, a glowing rage of being suppressed by the man...but that is Instructables member Yokozuna's
Oh, back to this...
It is a lot of work to catch a real lightning bug. You have to stalk out a place where there are fireflies. Then you are responsible for the care of your new pet. As a kid, catching a firefly in a jar( make sure you punch some tiny air holes in the cap ) rates up there with flying a kite. There are hours of enjoyment and wonder to be had just watching it do it its thang.
So, is there something about a simple flickering light?
What does it mean to you, a glimmer of hope for the future that will never fade?
Will this couple be entwined forever? Will one extinguish before the other? Will they both burn brightly together?
That's the mystery of life.