A cool two model set lets you build 2 great amusement park rides. The detailed building instructions are provided inside for a fun building experience. Models are designed to be fun and great for beginner builders as well as advanced. The smooth motion is a pleasure to watch. The pocket sized models in the MECHANIX Starter series requires a unique type of imagination and creativity in use of parts. The limited number of parts pose a challenge to create, but with the experience of building one model, that is shown, it makes the process easier. , , The manual provided can help you build any of the models mentioned in the set. Just remember these few points in your build: , 1. Follow the steps mentioned in the manual and watch out for the notes mentioned. , 2. Always remove the parts required in the step aside. After completing the step, noticing if any parts are left is a good way to recheck before moving on.