The Yankee is a skill level one rocket because it uses a low powered engine and it is easy to build.

      Other skill level one rockets include Alpha, Racer, Big Dawg, and Sizzler.

      The Nova is a skill level two rocket because it uses a medium powered engine and it is harder to build.

     Other skill level two rockets include Thunderbird, Fat Boy, and Nemesis.

   The Comanche is a skill level three rocket because it uses a high powered engine and it is very hard to build.

    Other skill level three rockets are Broadsword and Prowler.