Create a whimsical image displaying an oversized, vibrant tennis ball in the centre with the number '70' overlaid in a bold, whimsical font. Orbiting the tennis ball are four diverse, stylized granddaughters: one of Black descent, one Caucasian, one of Hispanic descent and one South Asian. Also surrounding the tennis ball are three diverse grandsons: one of Middle-Eastern descent, one White, and one of East Asian descent. Each child is holding a birthday-themed element like balloons or streamers, portrayed in a dreamlike manner. The background is a swirl of abstract, pastel hues giving an impression of a celestial celebration amidst clouds and stars, reflecting the joy of a 70th birthday party entwined with love for tennis and family.

Generated with these themes: 70th birthday, Tennis, 4 granddaughters, and 3 grandsons.

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