Here are some ideas for an elementary-aged Christmas party for a church, including games and crafts:

1. Snowman Building Contest: Divide the children into teams and provide them with materials like toilet paper rolls, construction paper, cotton balls, and markers. Set a timer and see which team can build the tallest or most creative snowman.

2. Ornament Decorating: Set up a craft station with plain ornaments, paint, glitter, and other decorative materials. Let the children unleash their creativity and decorate their own ornaments to take home.

3. Pin the Nose on Rudolph: Create a large poster of Rudolph without his red nose. Blindfold each child, spin them around, and have them try to pin the red nose in the correct spot. The child who gets closest wins.

4. Christmas Bingo: Create bingo cards with Christmas-themed pictures or words. Call out the items randomly, and the children can mark them off on their cards. The first one to get a line or a full card wins.

5. Christmas Scavenger Hunt: Hide various Christmas-themed items around the church or designated area. Provide the children with a list of items to find, and let them search for them. The child or team who finds the most items within a given time wins.

6. Reindeer Antler Ring Toss: Create reindeer antlers using headbands and pipe cleaners. Set up a few cones or poles at different distances and have the children take turns tossing rings (made from paper or plastic) onto the antlers. The child who gets the most rings on the antlers wins.

7. Nativity Scene Craft: Provide the children with craft materials like popsicle sticks, construction paper, glue, and markers. Let them create their own nativity scene by building a stable and adding characters like Mary, Joseph, baby Jesus, and the animals.

8. Christmas Carol Karaoke: Set up a karaoke machine or use a smartphone with a speaker. Have the children take turns singing their favorite Christmas carols or songs. Provide lyrics sheets for those who need them.

9. Snowflake Cutting: Teach the children how to make paper snowflakes by folding and cutting paper. Provide them with different colored papers and scissors. Hang the snowflakes around the party area as decorations.

10. Christmas Storytime: Gather the children in a cozy area and read a Christmas-themed storybook aloud. Choose a story that emphasizes the true meaning of Christmas and the birth of Jesus.

Remember to provide snacks and refreshments during the party, and consider giving out small prizes or treats to the winners of the games.