Have you ever tried to create a scene and the words just don't come. There's a wonderful description in your head... but you just can't get it down on paper. Try writing one word associations.
Ex: My bubble descriptions above
Instead of: I watched the bubbles rise as Jim blew them into the air.
I have: The fragile bubbles floated through the air, wispy, shimmery balls of nothing. They danced away from the wand, transient and gone.