This kit comes with all the parts you need for 50 students to make C02 dragster cars except for the basswood blanks. This kit comes well stocked with 2 cartridges per student. CO2 racing makes learning physical science subjects such as inertia, aerodynamics, thrust, gas expansion and friction a blasts. Not only will students enjoy learning, but their mastery of these topics will be evident in the outcome of their projects.