คุณลักษณะ

• Experience the difference in pressure due to the difference in the area of the part you touched. It is possible to confirm that the same volume has different weight depending on the substance.
• Since this is a rectangular shape, you will be able to experience the difference in pressure applied to the palm of your hand due to the difference in the area of the bottom surface when placed on the palm of your hand.
• You can set two types of plastic, vinyl chloride and polyethylene, and learn that some types of plastic float in water while others sink.