Intruder Alarm-Spy Science
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- 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 +.