I am going to bring a small Christmas tree with lights and plug it in at the front of the room. I am going to wrap presents with objects inside that will remind the kids of gifts that Jesus has given us.
Then we will sing a song with the item. I am thinking of wrapping one box with candy canes inside as a fun out of season treat. I haven't thought of all the songs yet, but here's a few (I have included wiggle songs because I want to do this with the junior primary):

• Plastic flower (our beautiful world)
  Sing: Heavenly Father Loves Me
• Soap (atonement to cleanse us from our sins)
  Sing: I Like to Look for Rainbows
• Small Doll (our bodies)
  Sing: My Hands Upon My Head
• Temple Statue (temples to seal our families and learn of him)
  Sing: I Love to See the Temple