All kidding aside, the BEST way to get your young ones to leave the buttons alone is to take the time and TEACH them to not touch. It's really not that hard, and will result in making alot of other 'Don't Touch' lessons much easier in the future.
I have a daycare in my home, and have up to 8 kids in the main room everyday. I also have all my audio gear accessible to everyone. It is not an issue until a new kid comes along, and then I just teach them the same lesson. Use words like 'no touch', move them away from the immediate area and give them something else to focus on. Supplying 'extra' remotes, without batteries, is also an excellent tool to teach young ones to leave 'Daddy's remote' alone.
If you simply BLOCK them from access, they will continue to look for ways to get into your stuff. If you take the time to teach them the lesson of 'not playing with other peoples toys', it is a lesson that will stay with them forever.
Kids are really smart. They don't need to be tricked, they need to be taught.
My 2 cents,

Lonster