Hertan Maailma (a.k.a. Happy Adventure) is a child-focused media format, is loved by children and appreciated by parents, and is safe, educational and above all, fun.
The first episode of Hertta's TV-series aired on March 2008 on Pikku Kakkonen, a finnish magazine-type children's TV-show shown on Yle TV2.
Today Hertta is very famous in Finland. Even PewDiePie has "played" her games (video).
I was an art director on this production from 2007 to 2009 and I was a consultant and graphic designer in project of Hertta's mobile games from 2012 to 2013.