The four-year-old, who has not been named, knocked the sculpture of Nick from 'Zootopia' over just an hour after the display at the LEGO Expo in Ningbo, Zhejiang Province, had been opened to the public
The creator of the figurine, Mr Zhao, said it had taken him three days and nights to build.
He posted before and after photos of his creation on the Chinese social network Weibo.
The Beijing Youth Daily newspaper reported that the sculpture was worth 10,000 yuan, which is equivalent to £10,530, according to CCTV news.
After news of the incident came about, the hashtag #ManSpends3DaysAndNightsBuildingBlocks began trending on Twitter.
According to CCTV news, the parents of the boy apologised and offered to pay for the damage.
Mr Zhao said he would "not be accepting any compensation" as the child had not done it on purpose.
"The child did not intend to break it," he said.
He added, according to News163: "The child is too small, the staff did not see, so we have a responsibility."
When the images were shared on Facebook, many were quick to express their opinions.
"They should have made the child put it back together," one person wrote.
"He either would have gained some engineering skills or would not want to see another LEGO block for the rest of his life."
Another commented: "When are these parents going to take responsibility for the child's actions?"