Other interesting Gamificiation articles: look in

Why animals play:

Gamification in indigenous tribes:

Op-Ed: Counting Coup | Gamification Blog

Gamification: When two tribes go to work – Features, Gadgets & Tech – The Independent — Jerz's Literacy Weblog

gamification in animals:

10 animals that learn through play | MNN - Mother Nature Network

So You Think You Know Why Animals Play… | Guest Blog, Scientific American Blog Network

Gamification talks:

TEDxKids@Brussels - Gabe Zichermann - Gamification - YouTube

CS4HS Pecha Kucha "Gamification of Education" - YouTube

Fun is the Future: Mastering Gamification - YouTube

Meaningful play:

Meaningful Play: Getting Gamification Right - YouTube

Tinkering school:

TEDxKids@Brussels - Gever Tulley - Tinkering School - YouTube