Video of twin giant panda cubs celebrating their first birthday has been released by a zoo.

Jia Panpan and Jia Yueyue were born at Toronto Zoo in Canada in October 2015 after their parents arrived from China the previous year.

In accordance with the Chinese custom for one-year-old babies, the zoo arranged four boxes inscribed with four Chinese characters - meaning money, happiness, life and bamboo - to let the cubs to choose one.