Experiment 1:

What you'll need

• A pencil
• Clear tape
• White paper
• Magnifying glass (optional)

Steps:

1. Scribble with the pencil on a piece of paper to create a dark patch.
2. Rub your finger on the pencil marks to cover your fingertip with graphite.
3. Press your finger onto a piece of clear tape.
4. Stick the tape onto white paper.
5. Observe your fingerprint! Use a magnifying glass if you have one.

What's happening?



Every person has unique fingerprints! The tiny ridges on your skin create patterns that are different for everyone. This is why fingerprints are used to identify people.

Experiment 2:

What you'll need

• A cup of water
• Baby powder or cornstarch
• A towel

Steps:

1. Sprinkle some baby powder or cornstarch on your hand.
2. Gently shake off the excess.
3. Dip your hand in the cup of water.
4. Observe what happens to the powder.
5. Dry your hand with the towel.

What's happening?

Your skin produces natural oils that make it slightly water-resistant. The powder should form little beads of water on your skin instead of being washed away immediately. This helps protect your body from losing too much moisture.

Experiment 3:

What you'll need

• Three bowls
• Warm water
• Cold water
• Room temperature water

Steps:

1. Fill one bowl with warm water, one with cold water, and one with room temperature water.
2. Put one hand in the warm water and the other in the cold water for 30 seconds.
3. Then, quickly put both hands in the room temperature water.
4. Notice how the water feels to each hand.

What's happening?

Your skin has special receptors that help you feel temperature. After being in different temperatures, your hands will perceive the room temperature water differently. This shows how your skin adapts to help you understand your environment.

Experiment 4:

What you'll need

• A cotton swab
• Lemon juice
• A lamp or other heat source (with adult supervision)



Steps:

1. Dip the cotton swab in lemon juice.
2. Write a secret message on your arm with the lemon juice.
3. Let it dry completely (it will become invisible).
4. With adult help, hold your arm near (not touching) a lamp or other heat source.
5. Watch your message appear!

What's happening?

The heat causes a chemical reaction that makes the lemon juice turn brown. This experiment shows how your skin can react to different substances and environmental factors. It's also why it's important to protect your skin from too much heat or sun!