DIY bottle cap snowmen ornaments- would be fun to do with Luke. I'm sure Emily could supply the bottle caps for us!
Soda Can Pop Top Chainmail. This tutorial shows how to make a lamp, but the same technique could be used to make DIY cosplay armor. More photos and complete tutorial on clickthrough.
Popsicle stick snowflakes are such a cute craft plus they make the most beautiful Christmas wall art.
Peanut Snowmen DIY Christmas Ornaments for Kids to Make