Have A Theme, But Need Ideas

How elaborate a castle do you want? Columns connected with swags of gossamer and little white lights can make a huge impact with little cost.
Yellow bricks are easliy painted on canvas or heavy paper and attached to the floor.
I`ve seen ruby red slippers as table decorations. Old shoes covered with glue and rolled in red glitter. Oasis or foam in the shoes hold English Ivy, flowers, etc.
A costumed wizard and wicked witch would be interesting.