A great site to go for ideas is at Family Fun Magazine--they have all kinds of crafts that children can actively participate in, are easy, have pictures etc.
For instance there is a
Handprint Santa Card
here is the page of
Holiday Crafts
Cookie mixes in a jar are good, or soup in a jar to help a busy teacher to get dinner on the table
Button Snowman---you can make it into a magnet or pin
Decoupage Paperweight
Bookmarks are good too--and as a paper crafter I know you have the tools to do so