New technologies offer new learning opportunities for teaching science also in primary. Simple experimental situations based on on-line sensors are proposed for interactive activities as a powerful extension of senses. In particular they can allow a phenomenological exploration of thermal processes based on a thermodynamic approach. The exploration of thermal properties by tactile sensation is widened by the use of on-line sensors. In the proposed didactical approach, pupils correlate the processes they realize with the real time graphs they observe, activating imaginative reduction of the concepts under study.
