'Rub a needle across a magnet & float it on a piece of paper in a bowl of water'
make a compass
HOW DO YOU...: Rub a needle across a magnet & float it on a piece of paper in a bowl of water
Rub a needle across a magnet & float it on a piece of paper in a bowl of water
Rub a needle across a magnet & float it on a piece of paper in a bowl of water
HOW DO YOU...
make a compass
HOW DO YOU...