Magnetic Intruder Alarm - Kidz Labs Science and Nature Puzzles kits and games watching platypus and echidnas swim

watching platypus and echidnas swim and play

this specimen is compact enough for a desk

the smallest

Their shape and form vary depending on their purpose within ceremony and lore

Nautilus Pompilius from CollectA’s prehistoric model range

Magnetic Intruder Alarm - Kidz Labs Science and Nature Puzzles kits and games watching platypus and echidnas swimDon'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