How to Make a 12 Leaves Mechanical Irirs: Materials: 1 - bicycle chain......yes a bicycle chain, you'll seee what's for. 1 - copper sheet 1 - 15mm MDF board (20 x 20 cm will do) 1 - 3mm MDF board (20 x 20 cm will do) ( not on the pics) 1 CD tube case And also some tools such as: Bicicle c…