I always do 'fruit kebabs' at the kids parties, but this is a much better idea, they can pick what they like!
rainbow party table centrepiece - Google Search
My Little Pony PEZ Candy Packs: 12-Piece Display - goody bag
Cool for a party, but also all the letters for Brooke's rainbow themed room... B in red, R in orange, O in yellow, etc. All on a sky blue wall.
RAINBOW - Party Package
16 Closet Organization Hacks That Will Change Your Life
Rainbow Balloon Carnival Game!