Carpet sweeper and sickle: what they have in common

1. Step 1. Carpet sweeper — is made of — Plant fibre. The brush is bristle.
2. Step 2. Plant fibre — is material for — Darts. Modern ones are made of compressed sisal.
3. Step 3. Darts — evolved from — Bow and arrow. Accuracy of shooting.
4. Step 4. Bow and arrow — is made of — Flint. Arrowheads were knapped from flint.
5. Step 5. Flint — is material for — Sickle. Neolithic sickles were a wooden base with flint inserts.

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