Generate a delightful birthday-themed illustration displaying a joyous atmosphere with pastel-colored balloons and streamers. The primary focus should be a whimsical birthday cake centerpiece adorned with playful icons representing hobbies or related symbols such as a 'switch', 'maths', 'reading', and 'internet video streaming service'. The cake takes on a design featuring: a small switch symbol, mathematical symbols and numbers dispersed artfully, an open book with inviting pages, and an iconic play button symbol representing internet video streaming services. All these elements should be harmoniously integrated, implying a celebration of knowledge and digital entertainment within a traditional birthday setting.

Generated with these themes: Switch, Maths, Reading, and Youtube.

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