Physics
Discover the Bell, Buzzer, and Switch Kit
Students use these totally self-contained kits to assemble an electromagnet, sounder, buzzer, and a bell.
The set Includes 5 complete kits with all the materials required (except batteries), plus student manuals and a teacher’s guide. For junior high school and up.
Pack of 5
https://www.wardsci.com/store/catalog/product.jsp?catalog_number=470105-118