ionKids helps you keep an eye on your deliquent children
If you're still on the fence on being an overbearing/overprotecting parent and looking for something to kick you over, look no more. Check out the
ionKids child monitoring system. The wrist device your child is supposed to wear is water and tamper resistant and will only detach from the wrist via a special key. It can also tell if the space between the device and the actual wrist is increasing and will send an alarm to the base unit. You can use the devices within 500 ft of each other (outdoors, indoors you get 350 ft) and if the child moves out of that range then alarms go off putting the device into Find mode so you can track'em down. -via popgadget-