In 2011/2012, I worked on Kawi Park with Allokids. Kawi Park is a big french MMOG for childrens.
I joined the project near the end of production, with all the game's quest to develop. To do that, I used the engine's proprietary scripting language and had to develop all the quest of the game and the overall quest architecture in six months.
During this, I learned a lot of things about the production of a big games, online games, monetization, and also a young public.
Unfortunately the game is now closed and can't be found online, although the IP (including a french TV show) is still here.