Øistein KristiansenØistein Kristiansen.

Øistein Kristiansen, formerly known under his artist name Einstein Kristiansen (born 12 September 1965), is a Norwegian cartoonist, designer, entrepreneur, TV host and co-founder of Earthtree Media AS (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. He usually draws with bright colours and exaggerated details.