I.  Material

Ingredient	Amount
Milk	Moderate
vinegar	about 2/3 of the amount of milk

Tools: kitchen paper, pot and mold.

II. Procedure1.

Warm the milk a bit.

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2. Pour the vinegar into it.

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3. Mix and wait for several minutes.

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4. Pour the liquid onto sheets of kitchen paper and squeeze out extra liquid.

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5. Add the semi-solid milk into the mold and let it dry in air for one to two days.

III. Results

Flexibility: 0

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Elasticity: 0

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Fragility: Hard and concrete