A system interconnecting units having conical shaped studs and recess for fabrication of building blocks, materials, furniture, toys, all typically having a three axis aligned array of elements. Units utilize orthogonal members having a combination of studs and recesses to allow various units to combine into combined units. Magnets can assist in attracting adjacent units together and keeping recesses and studs together. Studs and recesses are complimentary shapes, such as pyramids, cones, rounded cones, lipped pyramids, rods and cylinders.