Abstract: A modular toy construction system, comprising: a plurality of interactive toy construction elements, each interactive toy construction element comprising a sensor and/or a function device, the function device operable to perform a user-perceivable function; each interactive toy construction element further comprising a first communications circuit configured to wirelessly communicate signals and to wirelessly harvest energy for operating the function device and/or the sensor.

Abstract: A system for virtual interaction, comprising two or more portable electronic devices, is provided. Each device comprises, in turn, coordinate referencing means operable to define a coordinate system common to the portable electronic devices with respect to a physically defined reference position, position estimation means operable to detect a the physical position of its respective portable electronic device with respect to the reference position, virtual environment generation means operable to generate a virtual environment, and communication means operable to transmit positional data using the common coordinate system from that portable electronic device to another portable electronic device. The virtual environment is shared in common between the portable electronic devices. The virtual environment uses the common co-ordinate system within which each portable electronic device defines a position for itself responsive to its physical position with respect to the reference position.

Abstract: A system for virtual interaction, comprising two or more portable electronic devices, is provided. Each device comprises, in turn, coordinate referencing means operable to define a coordinate system common to the portable electronic devices with respect to a physically defined reference position, position estimation means operable to detect a the physical position of its respective portable electronic device with respect to the reference position, virtual environment generation means operable to generate a virtual environment, and communication means operable to transmit positional data using the common coordinate system from that portable electronic device to another portable electronic device. The virtual environment is shared in common between the portable electronic devices. The virtual environment uses the common co-ordinate system within which each portable electronic device defines a position for itself responsive to its physical position with respect to the reference position.