Traps

Summary
Traps are relatively inexpensive structures that remain hidden until they are activated by an attacking troop moving into their trigger radius. Once activated they have a one time effect and then they are consumed. Once consumed, traps must be repurchased in order to be a part of the next defensive layout. Traps can be sold for 20% of their purchase price.

Bomb
"Nothing says 'STAY OUT' quite like a good old-fashioned hidden bomb."

Explodes when an enemy comes into proximity. Works well near outside of village so larger areas of troops are weakened before breaking through.

Spring Trap
"This bouncy little number will toss unwanted visitors right off your property!"

Causes instant death to the first group of enemies to step on it. Does not affect P.E.K.K.A because of its heavy armor. It bounces up to 15 slots worth of troops. For example, it will bounce 15 archers or 3 giants. Helpful to put near or around town hall so you can get rid of large amounts of troops closing in.

Giant Bomb
"When you're looking for a Big Boom, you need the Giant Bomb."

Explodes when an enemy comes into proximity. Essentially a much more powerful (and expensive) version of the bomb.

Air Bomb
"Latest innovation in the field of flying pest control. This trap can blast multiple air units in a small area."

Explodes when a flying unit comes into proximity. Essentially an airborne version of the normal bomb.

Seeking Air Mine
"Is it a bird? Is it a plane? Well it makes no difference as the Seeking Air Mine will blow it sky high. This trap does devastating damage to a single air unit."