Physical interaction design DH2400

Instructable Web Page

I really found this 'Persistence of Vision Wand' a very fun idea. This is perhaps more of a playful project rather than a useful, still it's very clever. I think most of us have played with the persistence of vision phenomenon at least once, but I imagine that most of us would never think of way to further 'improve' on such a 'silly' thing. That's why I find this project so very inspirational.