A couple months ago, we posted a list of some of the coolest things that have happened at TEDActive on the TED Blog. If you have attended a TEDActive conference in the past, what were your favorite moments? Please add them to the comments below.

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Below are a few video highlights that were featured:

TEDActive 2012: Artist Kiehl Johnson taught the incredible “Everyone’s an Architect” workshop and attendees participating in the Urbanization Project rigged LED lights into it.

TEDActive 2011: This music video was directed by Hiro Murai and featured St. Vincent.

TEDActive 2010: The John Lennon Educational Tour Bus, Jill Sobule, John Doe, and a host of other talented attendees collaborated to write and record this inspiring tune. Data artist Aaron Koblin animated the video from drawings made by attendees addressing the question, “What does the world need now?”