The educational model of electric bell is designed so that all components are exposed and students can observe, analyze and discuss how it works.
All components including the electromagnet may be removed and reassembled for practice. The electric bell also includes an educational challenge for students. The challenge is how to connect it in order to work? It requires a 6-volt battery or similar power source. This bell can be purchased alone or with a contact wire and a battery holder that holds four AA batteries (It makes 6 volts). Batteries are not included.