Toy building block set

Claim 1

A toy building block system adapted for assembly to form a variety of configurations through connecting a plurality of blocks and inflatable members, comprising: a plurality of blocks and a plurality of inflatable members; each one of said plurality of blocks including a generally cylindrical body adapted to receive a portion of one of said plurality of inflatable members; each said one of said plurality of blocks having an outer circumference having a plurality of connecting elements and sockets; ones of said connecting elements including a neck portion and a head portion connected to said neck portion; ones of said sockets having two side walls contiguous with said outer circumference of said generally cylindrical body, a front wall extending between said two side walls, and an indentation in said front wall; said indentation being adapted to receive a head portion of a connecting element of another one of said blocks in either of two orientations which are at generally right angles to one another; ones of said inflatable members passing through at least two of said generally cylindrical bodies in supporting engagement therewith to enable a plurality of blocks to be connected to form an assembly including ones of said inflatable members so as to increase the buoyancy of an assembly formed thereby.