This project is an interdisciplinary challenge (an activity) which helps us to discover many symbols and significances concerning number 2. Communication, friendship, love, music, dancing, sports, all these activities can be made two by two.There are so many examples . Let’s find them together! Our project can be integrated in all education programs/curricula without disturbing them. All it requires is original thinking and creation of some connections betweenthe two concepts: intradisciplinarity and transdisciplinarity.