I can't draw a picture directly, but I can give you the perfect steps to draw this together! 9-year-olds are perfectly capable of drawing a great diagram, and it will make the concept so much clearer than just words.

Here is the best way to explain it to your kid, followed by a fun drawing guide you can do together.

### The Quick Version of the Answer:
It’s all about **tilting**. The Earth doesn't spin around the Sun like a top. Instead, the Earth’s axis is **tilted** at an angle of about 23.5 degrees. 

Imagine the Earth is a giant ball, like a basketball, floating in space. Because it’s tilted, half of the Earth always leans *toward* the Sun while the other half leans *away*. 
* When the northern part of the Earth leans toward the Sun, it gets a lot of direct sunlight, making it Summer. When it falls to Winter, that part of the Earth is leaning *away* from the Sun, getting less direct light. 
* *(Fun fact: When it's winter in New York, it's summer in Sydney!)*

***

### How to Draw It Together (Step-by-Step!)

You can draw this right now with your 9-year-old using a piece of paper and a pencil. Here is the outline:

**Step 1: The Sun**
Draw a big, bright yellow circle in the middle-top of your paper. Right next to it, draw three long orange lines coming out of the top of the sun to represent the sunshine hitting the Earth. 

**Step 2: The Earth (The Ball)**
Draw a big blue circle about the size of a tennis ball. This is our Earth. 

**Step 3: The Tilt (The Magic Angle)**
Under the Earth circle, draw a straight vertical line going down into the paper (this is the invisible line that holds the Earth up as it spins). Now, take the blue circle and place it on that stick, but tilt it slightly to the right, like a kid leaning on a seesaw. Do **not** leave it perfectly upright—that's the whole secret! Leave it tilted about 30 degrees to the right.

**Step 4: Label the Hemispheres**
Split the blue Earth circle in half with a vertical line through the middle. 
* On the **left side** of the paper, shade the top half of the Earth red. Write **NORTHERN HEMISPHERE**. Tell your kid that when this half tilts toward the sun, it gets more direct light, making it **SUMMER**.
* On the **right side** of the paper, shade the top half of the Earth red too, but label it **SOUTHERN HEMISPHERE**. When this half tilts away from the sun, it gets less direct light, making it **WINTER**.

**Step 5: Add the Labels!**
Write **Summer** above the left-tilted side, and **Winter** above the right-tilted side. Maybe even draw a little stick figure in each hemisphere wearing sunglasses or a heavy coat!

Once you draw it, ask your kid: *"If we flip the Earth over, which way does the left side tilt?"* And watch the "aha!" moment happen!