Brick studs and pneumatic tube: what they have in common

1. Step 1. Brick studs — is part of — LEGO bricks. Studs on top fit into the tubes of the brick below.
2. Step 2. LEGO bricks — uses — Elasticity. The grip relies on the elastic deformation of the plastic.
3. Step 3. Elasticity — is used in — Ball. Bouncing back thanks to elasticity.
4. Step 4. Ball — has part — Inner tube. A chamber with air.
5. Step 5. Inner tube — uses — Compressed air. Air.
6. Step 6. Compressed air — is used in — Pneumatic tube. Air pressure.

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