I think this Big Babol XXL Bubble Gum advertising is a great and bubbly idea to catch attention. I just wonder if the bubblegum is sticky.
You could make a similar 'color wheel' with wall paint, using cans, or something easily paintable and less breakable
How funny would it be to walk into just a regular bathroom (or so you think) and as you close the door a pop up comes out! lol [Ambi Pur Supersize Popup (Media) by Jacques Pense, via Behance]
Adidas shoebox pop up
IKEA Direct Mail - pop up style. Great direct mail item that is a form of novelty advertising which will surely resonate and be effective at keeping and retaining the receivers' attention.