Non-Fruit are objects that you can slice in Fruit Ninja but they are not fruit. All Skittles are targets in the game, but the crate and the Halfbrick Logo are not, they are found in the Main Menu.
These are from Fruit Ninja Vs Skittles. They are the targets in the game.
Double Points Skittle
|Gutsu's Cart Crate|
|Halfbrick MarketPlace Logo|