For the #mini-balloon-kit, we're sourcing lots of big mylar balloons, 32-36 inches in diameter. W...
Public Lab is an open community which collaboratively develops accessible, open source, Do-It-Yourself technologies for investigating local environmental health and justice issues.
As an open source community, we believe in open licensing of content so that other members of the community can leverage your work legally -- with attribution, of course. By joining the Public Lab site, you agree to release the content you post here under a Creative Commons Attribution Sharealike license, and the hardware designs you post under the CERN Open Hardware License 1.1 (full text). This has the added benefit that others must share their improvements in turn with you.
For the #mini-balloon-kit, we're sourcing lots of big mylar balloons, 32-36 inches in diameter. We're interested in clear or metallized mylar balloons. What are some of the cheapest ones folks have found?