Joint discs and personal computer: what they have in common

1. Step 1. Joint discs — is part of — Teddy bear. Movable limbs.
2. Step 2. Teddy bear — is made of — Wool. Plush.
3. Step 3. Wool — is material for — Felt. Matted wool.
4. Step 4. Felt — is material for — Piano. The hammers are covered with felt.
5. Step 5. Piano — has part — Keyboard. A keyboard.
6. Step 6. Keyboard — is part of — Personal computer. A keyboard.

Open Evothings