Reply to Comment

All cameras under the D7000 use Nikon's smaller camera build which does not have room for a built-in autofocus motor to be placed inside the camera.  As such, the Nikon D3200 does not have a built-in autofocus motor, and requires the lens to have its own autofocus motor, such as the Nikon AF-S Silent Wave Motor, or Sigma's HSM Hypersonic motor, etc.  As the D7000 has its own motor and use both lenses with and without built-in motors, you will have to ensure the lens you let your daughter use have a built-in autofocus motor; otherwise, she will simply have to manually focus the lens on her camera.  Metering and flash distance is still transferred to the camera, and the Autofocus Confirmation Light in the viewfinder will still light when she is properly in focus if the lens has computer contacts, even if it does not have a built-in motor for focusing.