Maybe your kids are using iPhone/iPad too much, as a parent, you want to know what they are having to deal with to help guide them through of that. Here is the tutorial on how you can parental control your kids on iPhone/iPad. You are able to monitor as well as take control of their devices. Kids' activities on iPhone/iPad like SMS, chats, web browsing will be recorded and you can check them remotely with e-mail without getting access to the devices. OK, here comes the steps:
Get your kids iPhone/iPad without their knowing and check if it's jailbroken.
If yes, go to step 2
If no, try to find a tutorial to jailbreak it. http://en.wikipedia.org/wiki/IOS_jailbreaking
Try to find the Cydia App in iPhone/iPad, and search an iPhone/iPad monitoring app.
Download and install the app by following the guide. It'll be done in 1 minu
Configure the app to send logs to your Email.
Check your Email and get your kids' passwords, chats, SMS, and web browsing on their iPhone/iPad.