Deodorant and sickle: what they have in common

1. Step 1. Deodorant — uses — Aerosol can. An aerosol.
2. Step 2. Aerosol can — has part — Valve. A valve.
3. Step 3. Valve — is part of — Watt steam engine. A slide valve distributes the steam.
4. Step 4. Watt steam engine — is part of — Grain elevator. Dart’s first elevator was steam-driven.
5. Step 5. Grain elevator — uses — Grain. It stores and transfers grain.
6. Step 6. Grain — is used in — Sickle. Cereals were reaped with a sickle.

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