20.
How to make people lose weight as simple as they gain weight?
How does 3D printing shoe feels like when people running on the trial?
How to make people make some efforts one/two weeks before the deadline?
What would people do in their spare time if they don't have a digital screen to look at?
How would you simplify a complex mechanism or design so as to make it understandable to a child?
Is there any difference between what you think would make you happy today vs. what would make you happy tomorrow?
When and why was the last time you took the menu back home from a restaurant? If you never took it, why didn’t you want to take it?
What would be required for you to trust an autonomous vehicle as if it was ubiquitous and routine?
What if I can make a device that helps us listen to the nature sounds that we can never hear by human ears?
How to take care of your cat(that do not usually going outside) when no one is home?
How would you design a product that help urban residents release their stress?
How might we use drone to create new services? medical aid? fire fighting? battery delivering?