1. Place desk in desired location along wall. 2. Use a circular saw to cut second-hand tables in half. Allow more depth on lower tables and go narrower on upper tables. 3. Spray-paint tables and desk in the same colour and stack them one on top of the other. Precision is not key here; the design is meant to be fun and whimsical... it's fun, it's functional, it's do=it=yourself, and it's art!