Interaction-capable device on a network

The invention relates to a building block (1) to be embedded in a communication system, which is adapted for generating a message (13) to read at least one inflatable object (100) featuring a general type of the message from a memory unit (10) and further comprising at least read a specific message content (110) from a data structure (11). According to one or more rules (140) hull object and message content are stored in a communication buffer memory (12) combined into one message. A method for realizing an interaction ability of a block includes a one set of types of messages (13) to be send, a dropping respectively associated hull objects in a storage unit (10) generating a data structure (11) me possible data content and providing a set of rules with rules for the composition of hull objects and message contents.