Chidren choose books at an book exposition in Bangkok, Thailand, April 2, 2013. A book exposition was held here on Tuesday, the International Children's Book Day, attracting lots of local children to read their favorite books. (Xinhua/Gao Jianjun)

Chidren read books at an book exposition in Bangkok, Thailand, April 2, 2013. A book exposition was held here on Tuesday, the International Children's Book Day, attracting lots of local children to read their favorite books. (Xinhua/Gao Jianjun)

Chidren read books at an book exposition in Bangkok, Thailand, April 2, 2013. A book exposition was held here on Tuesday, the International Children's Book Day, attracting lots of local children to read their favorite books. (Xinhua/Gao Jianjun)

A girl reads a book at an book exposition in Bangkok, Thailand, April 2, 2013. A book exposition was held here on Tuesday, the International Children's Book Day, attracting lots of local children to read their favorite books. (Xinhua/Gao Jianjun)

A boy reads a book at an book exposition in Bangkok, Thailand, April 2, 2013. A book exposition was held here on Tuesday, the International Children's Book Day, attracting lots of local children to read their favorite books. (Xinhua/Gao Jianjun)