Wooden beads in bright transparent colours have been played with by generations of children. Beads have therefore always been an important part of the Sio collection.
Another reason that beads were important to Sio is that in the process of colouring the wood, Siolieten, it was necessary to combine large parts with smaller parts in large varnish drums. The small parts, often beads were put together with larger parts like Sio Montage blocks and slats in the same drum. During the rotation of the drums the smaller elements coloured the larger parts.
After the colouring, the parts were sorted and put in baskets to be processed later.