The designer is Wan Weisheng (b 1932) who produced his first stamps featuring children in 1957 (which are his own favourite issue) by just going out and watching them play. He went on to produce many other sets including the ones I show in 1963. There are another 3 in the set but I don't possess them.
Wan Weisheng has produced many stamp sets and one from the "whole country is red" issue is famous for selling at a record price in 2009. Today he has retired and spends his time painting but his stamp designs are so popular that a popular museum is dedicated to his career in stamps, postcards and first day covers. He says that "stamps connect the artist with people around the world" And I would say with each other too. Happy Sunday Stamps.
An entry to Viridian Postcard's Sunday Stamps theme of - Children's Toys and Games