Create a whimsical birthday scene with a clean, vector-style illustration, emphasizing bold flat shapes and crisp lines.

**Background:**

Design the backdrop as a serene, light sky blue with subtle, fluffy white clouds scattered across. Position a rainbow with a smooth gradient of pastel hues—pink, lavender, mint green, and peach—arching from left to right.

**Foreground Elements:**

1. **Central Feature - Birthday Cake:**

Place a three-tiered birthday cake in the center, using bold geometric shapes. The bottom tier is a light pink with diagonal yellow stripes, the middle tier is lavender with white polka dots, and the top tier is mint green with peach-colored swirls. Atop the cake, include a small flag on a wooden dowel with the text “Mummy” elegantly written in bold, sans-serif white font.

2. **Floating Balloons:**

Scatter a few stylized balloons around the cake, each consisting of flat shapes and crisp outlines. Use colors such as lemon yellow, coral pink, and soft blue. Each balloon should have a string trailing downwards, featuring small geometric bows in contrasting colors.

3. **Decorative Elements:**

Incorporate a line of simple, stylized flowers in the foreground, using bold colors like red, orange, and deep green leaves, reminiscent of Yulia Sokolova’s style.

4. **Banner:**

Above the cake, include a banner gently arching from left to right with the text “Happy Birthday” in a playful, bold font. The banner should be a vibrant coral color with white text.

**Other Details:**

Add a few small, scattered stars in white and yellow around the scene, creating a cohesive design. These stars should mimic a confetti-like appearance, providing a festive touch.

This composition should balance playfulness with elegance, celebrating "Mummy" with clean lines and vivid colors inspired by the artists and movements mentioned.

Generated with these themes: Happy birthday mummy, and All about mummy.

Made with ❤️ by AI.