Use glass beads and top with real acorn cap! These were made for jewelry, but I could see the same thing done with beads or marbles and displayed in a container for fall.
Handmade Beaded Cross - Wire, beads, and nails
Recycled CD mosaic mirror frame (try a hammer on CDs if scissors too hard)
Popsicle Stick Angel Ornaments - great idea for a Sunday School craft.
Personalized Cat Christmas Ornament 4 round clear by DeLaDesign
Here is a super-simple Pinecone Turkey craft you can make with kids for fall or Thanksgiving.