If you are planning a wedding and plan to have a unity candle as part of the ceremony, you might want to think outside the box.
Traditionally, the unity candle involves three candles. The bride has one, the groom the other, and their two lighted candles light the third candle. This is done to represent the coming together of the two people to make one unit. In some alternate methods, family members are invited to participate in the unity candle lighting, often the mothers of the bride and groom, or other close members of the family. Each family then lights a candle, and together they light the unity candle to symbolize of the coming together of the families.
Now, there are a few twists you can add to this fairly conventional aspect of a wedding ceremony. You can provide each guest with an unlit candle when they arrive at the ceremony. After the couple lights the unity candle, they can ask the guests to move to the front of the church (or wherever the ceremony is being held) and light their candles with the lighted unity candle. This can take a bit of time and might be best with a smaller guest list. But it is a meaningful way to not only get your guests involved...