You can tell I am crazy about cardboard. But it really is your friend. My daughter turned 7 and this is what we did for your wizard of oz party. You can get large sofa or fridge boxes at many places.. I used a large gaylord size box. Decorated it too look like a house. Put legs sticking out from under it with my daughter ruby red slippers on the legs. I had the party in a large building but outside would be fun too. I took more cardboard and make the yellow brick road going all through the room with many stops on the way.. like cardboard trees with paper mache apples (small) filled with candy, hanging on the tree for kids to pick later. I had a pillar in the room to work with.. so I took black and white streamer and circled it too look like a tornado, anything would work. maybe a floor lamp? I took the cardboard and made a witch on her broom and hung from the ceiling. flying monkeys would work too.. and you could also take a large gaylord box and make the emerald city. we had a stage to work with so I took cardboard and made the emerald city into a prop. we all dressed up like someone from the movie.. In the entry.. I took one of those wire rose arches and filled it with different colored balloons.. they walked under this to get to the party. for the table clothes I used yellow cloth and took a marker and made bricks.. used blue paper plates and cups and etc.. food.. was a cake.. decorated in rainbow skittles as a rainbow.. sherbet (rainbow), to drink we had melted witch punch.. made with lemon lime kool aid and lemon lime soda, with orange sherbet. with a black plate with a black cone (used paper) taped to the plate to look like a witches hat, we floated this in the punch to give the look that the witch melted. Invitations were simple just "doctrine of thinkology" rolled up with a red ribbon. games we played where: kids acted like trees and where holding red nerf balls which they threw at others (placed like dodge ball)- pin the heart on the tin man- witch hat ring toss- face painting (rainbows)- broom relay throw a maze- I also got some pin wheels that looked like flowers and had them standing up.. for hats I got plastic funnels (oil funnels) and spray painted them silver and ran a string for the kids to keep them on with.. for party favors.. the kids got to keep the hat.. and keep a pin wheel and the small candy filled apples on the tree. I made the cake.. so with the cost of everything total including paint.. I spent under 100 dollars.. But most of all we had loads of fun.. Jamie