I enjoyed organising Tyvek workshops for many years,  but the last one was on the 7th of May 2016. I suggest  that you have a look at Google Search providing you with lots of information about Tyvek.

In case you really insist on attending a Tyvek workshop with me, we can talk about it if you bring along 4 other interested persons!  Mail me at saskia@weishut.com
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                       "Wherever I go"