Jet ski and telephone: what they have in common

1. Step 1. Jet ski — is made of — Fibreglass. The hull is fibreglass.
2. Step 2. Fibreglass — is material for — Motherboard. The board is fibreglass laminate.
3. Step 3. Motherboard — is a kind of — Printed circuit board. A printed circuit board.
4. Step 4. Printed circuit board — is part of — Mobile phone. All of a phone's parts are soldered onto a printed circuit board.
5. Step 5. Mobile phone — evolved from — Telephone. A mobile phone keeps the function of a telephone, replacing the wire with a radio channel.

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