The classic interchangeable spiro-tracks let you create your own unique pattern shapes, taking your designs to a whole new and super level! This package contains two racks, three design pens, six spiro-track end caps, one spiro-track tri-hub, four shaped wheels, 18 wheels in different sizes, 16 curved spiro-tracks in different sizes, two rings, spiro-putty, eight straight spiro- tracks, one 24 page design guide and jumbo paper and two 25 page design pads.Details:18" x 13" x 1.5" packaging size75+ piece setConforms to ASTM D-4236For ages 8 and upContents:31 Precision Spiro-Tracks21 Spirograph Precision Wheels12 Sheets of jumbo design paper3 Design pens2 Spirograph Precision Rings2 Spirograph Precision Racks2 design pads1 Pack of putty1 Design guide book1 Storage case1 Special edition 50th Anniversary die-case Spirograph wheel