Magnetic Intruder Alarm - Kidz Labs Science and Nature Puzzles kits and games the smallest

the smallest

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this specimen is compact enough for a desk

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Magnetic Intruder Alarm - Kidz Labs Science and Nature Puzzles kits and games the smallestDon't let anyone sneak into your room undetected. Build your own Intruder Alarm to keep out those pesky brothers & sisters, and while you are at it, explore how a magnet sets off this cool build your own intruder alarm. A great project for exploring how a magnetic switch works in an electric circuit. Simple construction of the alarm box is required. Requires 2 x AAA batteries. Ages 5 and over. Box size: 167 x 215 x 58mm Weight: 450g