Einstein Kristiansen

In 2011, Kristiansen started a YouTube channel named "Box Yourself". On the channel he posts tutorials on how to create various items with cardboard. The channel was started in 2011, but he did not post until 2014. The channel has since gained 308,117 subscribers (as of August 30, 2019). In the channel description, Kristiansen describes the channel like this, "Think it, Make it! Box Yourself inspires kids all over the world to see themselves as designers, creators and makers. We make design easy, engaging and fun."

He published a book entitiled "Draw Robots with Øistein Kristiansen: Get The World To Draw! (Learn To Draw)" in March 2014.

Kristiansen's company, Earthtree Pte Ltd, was originally known as Einstein's Earthtree Pte Ltd. However, lawyers from The Roger Richman Agency, on behalf of The Hebrew University of Jerusalem, issued warning letters to protect the image and identity of Albert Einstein. The lawyers also contested his use of the moniker "Einstein Kristiansen", and so in 2007, he changed his professional name back to his original name, Øistein Kristiansen.

In 2005, Kristiansen appeared in a self-funded series of live action shorts called "Right on Top". The series was transmitted on the Nickelodeon Southeast Asia feed. One season of "Art Mad", the show's long form, has been purchased for broadcast by German corporation Faber-Castell for transmission in Indonesia.

His television career in Singapore began in the mid-1990s as an extra for Mediacorp drama productions, but he was not taken seriously in the local market until the year 2000, when Perth-based CVA Productions began production of the children's arts and crafts drama show Art Factory for three seasons.

Øistein Kristiansen, formerly known under his artist name Einstein Kristiansen (born 12 September 1965), is a Norwegian cartoonist, designer, TV-host and co-founder of Singapore-based Earthtree Pte Ltd, who together with his two business partners Henry Steed and Mark Hillman, produces children's television programming, animation and image campaigns for MTV Asia, Nickelodeon and Singapore network Mediacorp TV12 (present-day Okto channel).