Toy Pineapple Hand Grenades with Sound Effects - 4 Pack Toy Battery Operated Pineapple Hand Grenades (Batteries Included) Quantity: 4. Colors: 2 Dark Green and 2 Gray Dimensions: 4" length x 2" diameter. Material: Hard Plastic. Has the word grenade engraved on the side. Hold trigger and timer sounds for 8 seconds before sound effect explosion. Release pin included as decoration.