TubeTalk Mockup (Task3)

I did a mockup for badges of mouth and speech bubble shapes, and asked my friends to roleplay the whole Tubetalk idea:

When entering the tube one would take a pin in a Tubetalk kiosk, customize it, and proceed with their journey.

Somebody else would notice a large bright badge and might get interested in what is being asked/looked for:

 ..which may lead to a nice conversation and mutually beneficial deal:

 After the badge being used and needed result reached, the badge owner would pin it onto an 'I Found It!' board at a station where he or she got the pin: