There are some things on Amazon which seem to be super duper cool- “Cool stuff on Amazon” and are just below $15.These thing are actually worth it.
Things under $15-
LED Bike Light-
A very cool LED that goes on your bike’s tire valve. It’s super easy to install and requires no other items to use.
Wild Tribe Credit Card Pocket Knife
Pull out your credit card and use it as a knife! Keep it in your wallet and always have a knife on you. Super handy and useful (and cheap!)