In a bright and cheerful park, the scene is set with lush, green grass dotted with a few dandelions, under a clear blue sky adorned with fluffy white clouds. Tall, leafy trees provide shade, while colorful helium balloons float gently through the air. The focal point of the gathering is a whimsical birthday stage, beautifully decorated with a large, colorful banner that proclaims, "Happy 90th Birthday, Grandad!" Multicolored balloons are attached to the sides of the stage, enhancing the festive atmosphere.

At the forefront of the stage, a towering, sparkling gold number 90 stands tall, symbolizing the grand milestone being celebrated. Meanwhile, a cheerful cartoon squirrel joyfully removes a giant cardboard '-1' sign from the side of the stage, its gleeful expression radiating happiness amidst the celebrations.

The beloved grandad, depicted as a jovial elderly man with a kind face, wears a festive birthday hat along with a comfortable sweater boasting the number '90' and jeans. He waves to a small crowd composed of animated, smiling characters, who include friends and family made up of cartoon animals and people donning party hats. Some hold gifts, while others carry plates of cake, all sharing in the joyous occasion with wide smiles and cheers.

Adding to the celebratory mood is a three-tiered birthday cake, decorated with candles and frosting, positioned on a table near the stage. The cake is adorned with 90 tiny candles, all lit and sparkling brilliantly. Multicolored confetti gently falls from above, further enriching the festive atmosphere. Above all this, a colorful banner stretched across the background declares “Happy 90th Birthday!”

The entire scene draws inspiration from a delightful mix of cartoon styles reminiscent of Schulz, Disney, Tezuka, and Watterson, blending classic and quirky humor to create a heartwarming celebration.

In summary, this vibrant portrayal captures the joyous celebration of Grandad's 90th birthday, with the symbolic removal of the '-1' illustrating the transition from a past age to this milestone.

Generated with these themes: My grandad turns 90 this year. I want the picture to include the theme of that he used to be 90 - 1 years old and now the -1 is being removed.

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