The world's first twenty four project made with the first arduino in this book.I'll tell you a fun project that you can do on a low budget. A small copy of your parking sensor we have seen in our life. First I will tell you what Arduino is doing. We can easily program with Arduino libraries. Using the signals from the sensors, we can design robots and systems that interact with the environment. Arduino has various cards and modules designed to provide solutions to different needs. We can develop your projects using these cards and modules.