What is a magnet? -- Is the Earth a magnet? -- What happens inside a magnet? -- What is a force field? -- How does its shape affect the poles of a magnet? -- Are all metals magnetic? -- Can a magnet work through things? -- In what other ways do we use magnets? -- Are there other invisible forces? -- How are magnetism and electricity connected? -- What is an electromagnet? -- Can a magnet make electricity? -- How do electrical generators work?