Lock controls during playback

My 2 years old daughter is using infuse to play cartoons. But she don’t understand (yet:) ) that cannot touch the screen to i.e. not stop, rewind the video or mute the sound.
The solution would be to add Lock Button. If i.e. User press the Lock Button for two seconds all controls are locked. To unlock user must again press the Lock Button for two seconds. Simple and usefull:)

Rgds, zusu.