New Lego-Like Reconfigurable Solderless Circuit Board 4x4 Standard 5eBoard Kit &ndash; Violet/Blue Board size: 4" x 4" Baseboard color: violet; Assembling block color: blue One set contains: 1 baseboard, 24 assembling blocks, a pair of bus lines, two board-to-board fasteners, and a separator Multiple boards can be joined together using provided fasteners for large projects