Setup Android for kids? How to setup Android so that the phone app is completely usable without a pin, but all others apps need unlocking
First of all, question is very nice.
You can do whatever you want for your kids simply by creating another account like a Guest.


  But, Google already launched their app called "Google Family
  Links". Here you can control whatever apps you want your kids to
  use and also how long they've access to the apps. You also track their
  usage by your phone and can lock (Blocking them from more usage) the
  phone.