Building block suitable for clamping cooperation with building blocks with cylindrical projections and an open underside, which building block is provided with an insertion slot for inserting a thin object

摘要

Building block, adapted to cooperate with building blocks having an upper wall with cylindrical protrusions and a substantially open bottom, all arranged to be able to clamp together, other similar building blocks, wherein the building block is provided with an insertion slot (4), arranged in order to be able to insert a thin object such as a card of, for example, cardboard or plastic, which insertion slot extends through the building block from top to bottom. The insertion slot can run straight down or diagonally down.