In this file photo taken in 1983, children play a bag toss game at a public park in Harbin, northeast China's Heilongjiang Province. As China celebrates the International Children's Day, there arises the occasion for grown-ups to think back over the joys of childhood. With the evolution of technology and lifestyle, children are exposed to a wider range of entertainment. Nevertheless, joy would remain a childhood motif no matter how its forms change with time. (Xinhua/Hu Wei)