However, the researchers appeared confident that these setbacks could be overcome and added that future 3D printers should permit greater control over reflectivity, light absorption and other factors allowing toy designers to incorporate additional functionality.

BBC: Disney develops 3D-printed lighting for toys

There are other challenges to overcome, including how the conductor will control a choir made up of people in different locations and acousticians will have to work out how the speakers will be arranged in each of the concert halls.

CNN: Musicians aim to create virtual choir

Using a force control system reacting to the pressure on the feet, HyQ can navigate and traverse irregular surfaces and adjust its pace to overcome obstacles of different sizes and shapes.

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