The invention provides a sensing device that can be incorporated in a construction element for a toy construction set to allow new use of construction elements, for instance tracking the construction process. Sensing device comprises a carrier comprising a top surface provided with a series of top coils, a bottom surface with a series of bottom coils at a distance from said top coils, the sensing device further comprising a data processor functionally coupled with a memory for storing a status, said data processor comprises a computer program which controls and reads currents through each of said top and bottom coils and storing them in memory, thereby tracking status for each of said top and bottom coils.