Around 2000 school children from across Kent will be taking part in a science jamboree at Discovery Park in Sandwich.
The young, budding scientists will be getting involved with experiments, forensics test and identifying Kent seashore wildlife.
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The rapper joins previously announced headliners Kasabian and Muse at the top of the bill.
Friday morning's forecast for the east of the region
Friday morning's forecast for the west of the region