This kit comes with all the parts you need for 50 students to make C02 dragster cars. This kit comes well stocked with 2 cartridges per student. Dragster Class Pack Parts List (19-5420) 100 x Rear Racing Wheels Cat# 19-1016 100 x Front Dragster Wheels Cat# 19-1015 100 x CO2 Cartridges Cat# 19-1018 50 x Steel Axles 2/pkg Cat# 19-1023 20 x Brass Washers 10/pkg Cat# 19-1021 5 x Straws 10/pkg Cat# 19-1022 50 x 12" Balsa Blanks Cat# 19-1014 4 x Screw Eyes 25/pkg Cat# 19-1024 1 x Idea Sheet Cat# 80-5766 You can also order the class pack without wood. Order 19-5422