Your child's First Communion is a special time and you naturally want to celebrate the occasion with your family and friends. Plan a party to occur immediately after she receives her First Communion or a few days later. With the right elements, the party can be something memorable for everyone.
Everyone in your church who has children celebrating First Communion is likely to want to celebrate that day. These people are unlikely to attend your party, as they'll be having their own. While your immediate family will definitely come to your party, other friends may receive more than one invitation. Send out invitations early to ensure that those you want to attend will have enough notice.
Although it's a joyous celebration, a First Communion requires less decorations and dazzle than a birthday party, so you don't need a lot of streamers and balloons. Tasteful decorations in white or pearl are your best bet. You can have a few balloons, use white tablecloths and decorate with a few bunches of fresh flowers. On your main table, you may want to have a decorative cross.
You'll want to give guests favours as a thank you for coming to the party. One idea is to print custom labels for foods, such as cookies, candy or coffee. You can also give small items like keychains that feature religious themes, such as crosses, angels and scripture quotes. Religious books are another potential favour.
You'll probably have a mixture of adults and children at the party, which can make it difficult to have organised activities. You could set up a table where guests can decorate their own cross-shaped cookie with frosting and candies. You could also play games with a religious twist, such as musical chairs using religious songs.
If you have more than one child in the family celebrating First Communion, you may want to have a joint party so that family members don't feel torn about going to one party or the other. Ask the kids if they mind sharing a party.