Carved wooden horse and hammer: what they have in common

1. Step 1. Carved wooden horse — is part of — Rocking horse. A saddle-shaped body.
2. Step 2. Rocking horse — uses — Pendulum. Rocking.
3. Step 3. Pendulum — is part of — Tower clock. A pendulum (since the 17th century).
4. Step 4. Tower clock — is part of — Gothic cathedral. A tower clock.
5. Step 5. Gothic cathedral — is made of — Stone. Cathedrals are built of dressed stone.
6. Step 6. Stone — is material for — Hammer. The first hammer was a hammerstone, later mounted on a handle.

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