For my daughter's 6th birthday she wanted a Wizard of Oz themed party. I got my idea from the Sing-a-Long Sound of Music show I had seen the previous year. We had an interactive sing-a-long Wizard of Oz party.  I sent out invitations, letting everyone know that it would be dinner and a movie under the stars. I made sure to include the time that the movie would be starting, so we would not be waiting for late comers. It worked great. Everyone was there on time.  I enlisted my sons to paint a cardboard house that was set up in the front yard with the Wicked Witch's ruby slippers and striped stockings sticking out from underneath.  We created a scarecrow that was posted in the garden and a sign post directing guests to the back via the yellow brick road to the party, or Emerald City, or Munchkinland depending on the direction they choose.  The yellow brick road ran from the front yard, through the house to the back yard. I used a roll of yellow plastic tablecloth that had bricks drawn on with sharpie. I had set up the large screen TV outside in the backyard, under a canopy and hundreds of little white Christmas lights strung all over the backyard.the kids all sat on picnic blankets and table and chairs were set up with blue and white gingham table cloths for the adults. My husband started the movie, first instructing the kids that when Dorothy came on screen everyone was to cheer.  Then when the Wicked Witch came on everyone was to boo and hiss.  Any time Glinda appeared he blew bubbles all over the back yard. He had all the kids singing along with the songs, by putting on the subtitles whenever a song came on. When it started to snow in the field of poppies he threw white confetti on the kids. I served dinner to the kids on trays so they would not miss the movie. We had an intermission when Dorothy and her friends started from the Emerald City to find the Witch.  My daughter open her gifts and we served cupcakes. We had cupcakes with ruby red frosting and edible red glitter for Dorothy's slippers, ones with white frosting and a black licorice scotty dog for Toto, Green frosting with green glitter for Emerald city, another shade of green frosting with witched hats (made from the ends of sugar cones dipped in choclate and then set on the top of the cupcake and chocolate icing piped around to make the brim of the hat), and ones with peach frosting and irridescent glitter and silver star garland for Glinda. Once the movie started back up, a very good friend of the family dressed up as the witch (green paint face paint and all) and waited in the back of the house for the scene when Dorothy throws water on the Witch.  We had cups of water waiting and on que the Witch appeared in the backyard and the kids all got to throw water on the Witch as she melted.  The kids all thought it was the best party and wanted to know what we will be planning this year.  As the kids left we had bags with Glinda bubbles,and Munchkin lollipops for them to take home.