I love this product, the Taptaps or Bambams sticks.
You hit both inflated stick against each other and you obtain a loud sound.
Image a football stadium with 10 000 or more persons banging these bambams sticks together. It makes an impressive promotion. And if the game is shown on TV the sponsor gets a free TV spot showing his logo on thousands of Bambams sticks.
For more information on the bambams sticks : www.horizonsources.com