Hummer Cover Child Safety Locks - My Car Does Not Have Rear Child Safety Locks. How Do I Lock Doors From Inside?

Child Safety Locks - My car does not have rear child safety locks. How do I lock doors from inside? - hummer cover

For 2007 we have Hummer H3 and the rear seats are not safety locks for children. Is there a way to open the door of change from outside? Or is there a product you can not (the movie), the right to block or block and buy to cover handling work?
Please share. Thank you in advance for the help.