Nothing new here.
The Japanese "robot" ASIMO was a similar deception, only that was a double bluff - a real robot passed off as a Japanese child in a plastic costume pretending to be a robot. Their major mistake was the clumsy way the legs were attached to the torso, which led observers to conclude that no real child could have worn that "robot suit". Also, as the years of "development" rolled by, any real child would have outgrown the suit.
In the UK schoolchildren were similarly deceived by Ken Dodd and his "Diddy Men", who were supposed to be a miniature race of people from Knotty Ash (actually a real place deliberately chosen for its daft sounding name) and were famously not the inspiration for Roald Dahl's Oompa Loompas. The Diddy Men all had convincing sounding names such as: Dicky Mint, Sid Short and Hamish McDiddy, and they danced around and sang in chipmunk style voices. But it eventually came to light that it was all a clever conspiracy perpetrated on the nation's school kids and that the "Diddy Men" were actually just children dressed up.