After the Kickstarter is complete, we will invite all of our backers to another service called Backerkit, there you will get to put in your address and specify which addons you want and answer any poll questions, so we know exactly what to make and where to send it.
Like above, once the Kickstarter is complete, you'll get a chance to specify all the addons you want, and more information! Hang tight, everyone will get a chance to have their voice heard, starting with picking out what things they want to get.
Don't see the answer to your question? Ask the project creator directly.