On the stand we have a candle burning. The hot air is going up and spinning the aluminum helix.

Build a ballista from a wooden spoon.

The water from the upper bottle will create a pressure and the water will run through the tube and spray in the container.

Make paper butterflies fly with static electricity.

A colorful disk is connected to an apple with a pencil. When the disk is rotated the colors are mixing.

How to make giant bubbles with soap water.