4M - Intruder Alarm - Spy Science
Stop unwanted intruders from entering your room while learning the science of electronic circuits. Set includes 1 plastic platform & alarm casing, 1 electric buzzer, 1 electric wire, 1 string alarm trigger, plastic accessories & metal pegs, & detailed instruction & fun facts.
- Requires 2 AA batteries (not included).
- Ages 8 years +