Budding scientists put their knowledge of nanotechnology to the test with computer-controlled robots at the Hong Kong FIRST (For Inspiration and Recognition of Science and Technology) Lego League Robotics Tournament held earlier this month.
Nanotechnology is the science of building electronic circuits and devices from single atoms and molecules.
The competition was divided into three parts - computational programming and design of the robots; research presentation on nanotechnology; and cheering team slogans.
More than 350 students from 46 primary and secondary schools took part in the contest, organised by the Hong Kong Federation of Youth Groups (HKFYG).
In one task, some Lego blocks were presented as pizza molecules. The Lego robots had to remove the blocks from the plate and bring them to a Lego-man.
This suggested that smell - or more precisely the scent molecules - from the pizza can spread through the air and into the receiver's nose.