Abstract: A method for connecting and disconnecting two blocks, a first block having at one end a socket for accepting a ball protrusion from a second block. The first block includes a plurality of elongate clip arms which when squeezed towards one another assist with: (i) insertion of the ball protrusion of the second block into the socket of the first block, and with (ii) removal of the ball protrusion of the second block from the socket of the first block. The method comprises: providing a pair of blocks for connecting to and disconnecting from one another; then when connecting the first block to the second block: situating the ball protrusion of the second block adjacent the socket of the first block; squeezing the plurality of elongate clip arms on the first block towards one another; inserting the ball protrusion of the second block into the socket of the first block; and discontinuing the squeezing of the plurality of elongate clip arms on the first block to connect the first block to the second block.