Obviously you're not going to want to use this to wake your first-grader (as much as you may want to sometimes), but for those sluggish, hormonally grumpy older kids who've become way too friendly with their snooze button, the Sonic Grenade Alarm ($14.99) is the perfect way to get them the @#%! out of bed, pronto. Pull the pin, lob it into Pubert's bedroom, and within 20 seconds, one of three ear-shattering sirens will fill the air. No need for a pesky clock function, either -- this sucker's designed for one thing and one thing only.