an inexpensive air valve - connector can enable the construction of inflatable structures having multiple inflatable components . in particular , an inflatable component can be connected to an inflated structure and inflate without deflating the structure . specifically , positive air pressure generated by an air blower , i . e . a fan , is used to inflate a structure composed of one or more blocks that self - inflate upon connection to inflated blocks . the air valve - connector can be embodied in a low - cost building block toy . the air valve - connector can also be used to create other inflatable structures , such as decorations and signage . the air valve - connector comprises two light - weight connectors that can exist on opposite sides of the same block . the valve includes a compressible material , such as foam , that is actuated to open the valve . when two blocks are connected via the air valve , air is transferred from a first block to a second block .