Product designer Konstantin Achkov has created a range of flat-pack furniture that slots together like a puzzle.
Called Stack, the pieces are assembled without glue, screws or other fixings.
The collection so far includes a round table, bar stool, chair and armchair.
Each one is made of 18mm-thick beech plywood, cut with a computer-controlled router.
The pieces were presented at Sofia Design Week from 1 to 8 June.