The DynaMICS (Dynamics and Magnetism from the Internal core to the Chromosphere of the Sun) space project is devoted to the long trend (decades or centuries) global properties of the Sun. Its main scientific objectives are the following: (1) to get a complete 3D rotating and magnetic picture of the Sun from the central core up to the chromosphere, (2) to deduce from it the different sources of dynamo and their interplay, (3) to build models and predictions of the great maxima and minima solar activities, (4) to produce outputs useful to quantify the different aspects of the solar contribution on the earth climate. We outline here the instruments: GOLFNG, SODISM, PREMOS, MOF that we are developing to reach this goal. They will detect from space solar acoustic and gravity modes together with radius and irradiance variations and will improve our knowledge on the transition region between photosphere and chromosphere. Understanding the magnetic field of the radiative zone is a new and crucial objective as this ingredient must play a role in the long-term Sun-Earth relationship and also in the knowledge of stellar interiors. These instruments will observe the Sun from an orbit around the Lagrangian point LI for a decade to ensure continuity, stability and measurements of tiny variations.