Spiral Tower

Spiral Tower is a compact masterpiece of mechanical design. A paddle-lift carries marbles up the tower while a helical chute delivers them back to the base — a perpetual loop powered by a single turn of the crank. Built from 201 laser-cut wooden pieces, the tower assembles without glue using precision-fit joinery. Every gear, every axle, every chute is part of the motion — there's no decoration here, only function. 4–5 hours of pure screen-free flow state. The perfect first Tactow build — challenging enough to feel earned, fast enough to finish in a single sitting.