"A" for Angry. "B" for Birds. The heroes of an addictive mobile game dishing out revenge on evil pigs have landed in a classroom in Singapore to prep kindergarten children the Angry Birds way.

Finland's Rovio, the company behind the game franchise, has partnered with Singapore preschool Dreamkids Kindergarten to launch an Angry Birds Playground in the city-state, the fourth globally after openings in China last year.

A giant indoor tree house takes center stage in a classroom dotted with stuffed Angry Birds toys and matching wallpaper, while a large wall-mounted touch screen plays educational games.