Concrete tiles, various models: Stream Ribs (1994, 50 × 50 cm, self-produced), Smooth Waves (1996, 200 × 200 cm, Struyk Verwo Infra), Floating Pebbles (1998, 60 × 60 cm, Zoontjens Beton — Dreen design), Binary Fields & Mystery Spots (2002, 60 × 60 cm, Zoontjens Beton — Dreen design)