The Sonic Grenade ($13) is a realistic hard rubber and plastic grenade that emits extremely loud sonic sounds to drive someone absolutely nuts. Just pull the pin and it's armed, toss it and get away. The only way to turn off the alarm is to replace the pin. This could be fun in the office rolling it down the hallway, tossing it into a roommate's room in the middle of the night with a bad hangover or just a great way to wake up your kid's for school. I love this thing, so many fun possibilities.

• Sonic alarm with 3 volume levels.
• Pull the pin and 20 seconds later the alarm will sound.
• Requires 3 x AAA batteries (not included)
• Size: 13 x 8 x 6cm