Øistein Kristiansen, formerly known under his artist name Einstein Kristiansen (born 12 September 1965), is a Norwegian cartoonist, designer, entrepreneur,[1][2] TV host[1][2] and co-founder of Earthtree Media AS[2] (originally 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 Mediacorp.

[1] His career began at age 9 when he draw a cartoon depicting a Norwegian farmland which became featured in the front page of his school newsletter.

While on transit at Changi Airport, he went on a spontanteous bus tour of Singapore and fell in love with its mix of traditional and modern elements.

[5] Gaining from his stage presence at the comedy club,[1] Kristiansen's television career in Singapore began in the mid-1990s as an extra for Mediacorp drama productions, including as a guest in Hip-O and Friends.

Kristiansen also produced the reality TV competiton Doodlechamps, where "young artists selected from schools across Singapore participating in challenges to transform random squiggles into creative doodle art".

One season of "Art Mad", the show's long form, has been purchased for broadcast by German corporation Faber-Castell for transmission in Indonesia.

While still living in Singapore, Kristiansen created an animated series called That's Imagination in 2008 which aired on Norwegian television, which opened up opportunities for his company.

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.