We are experiencing a disruption with email delivery. If you are not receiving emails from us, please try after 8am EST.
x
Mark_roberofficial
New ScratcherJoined3 years, 1 monthagoCanada
About me
Hi I am Mark B. Rober an American YouTuber, engineer, and inventor.I am known for my YouTube videos on popular science and do-it-yourself gadgets. Total views:2.96 billion
