There are several gliders you can unlock for your kart in in Mario Kart 7 for the Nintendo 3DS, which are unlocked by collecting coins in Grand Prix mode.
Kart gliders purchased with coins are unlocked in random order, but here are the gliders that are available.
Unlockable Gliders With Coins
Peach Parasol Glider
Unlockable Gliders From Other Methods
Golden Glider – Connect with 100 people through StreetPass, or collect 10,000 coins
Check out my other guide if you’re looking for the full list of unlockable kart parts in Mario Kart 7.