This is the second revision of the extremely educational 2 Cycle Aircraft Engine Model! All the parts are included so that you can build your own working model of an airplane engine! This is a great too for teaching kids about the inner workings of a basic engine, just assemble and turn the crank on the back of the case and bam! You are now a RC Airplane Engine Expert! Note: Some Assembly is required, please PM me if you have any questions!