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18 July 2014 Last updated at 17:37 BST
Today the five top entries were announced after being selected by Tim and award winning chef Heston Blumenthal.
The winners will now work on developing their ideas to get them ready for Tim to eat during his 6 month mission to the International Space Station
Earlier this year, school children across the UK were set the challenge of designing a dinner, for British astronaut, Tim Peake, to eat when he goes in to space in 2015.