Carriage body and oil lamp: what they have in common
- Step 1. Carriage body — is part of — Stagecoach. A closed body.
- Step 2. Stagecoach — has part — Wheel. On four wheels.
- Step 3. Wheel — has part — Axle. A wheel turns on an axle.
- Step 4. Axle — is part of — Yo-yo. The axis between the discs.
- Step 5. Yo-yo — is made of — Clay. Greek yo-yos were terracotta.
- Step 6. Clay — is material for — Oil lamp. Later — clay ones.