I'll create a simple SVG showing layers or levels to convey the concept of "deep".
I've created a simple icon using:
1. Layered rectangles in progressively darker shades of blue to show increasing depth
2. An arrow pointing downward to reinforce the concept of depth
3. Rounded corners and clean shapes to keep it child-friendly
Would you like to see alternative versions? We could try:
1. A side view showing layers going down (like a cliff or ocean)
2. A more abstract version using concentric circles
3. A simpler version with fewer elements
The nice thing about SVGs is they're:
- Scalable to any size without losing quality
- Very small in file size
- Easy to modify colors and styles
- Accessible and can include descriptive text for screen readers