I have a 5 year old (and wife, ahem!) that cannot remember which switch should turn off what. I have a 2 gang box with 2 switches. One is a 3 way switch for lights and the other is power to a ceiling fan that is controlled by a remote. When the switch for the ceiling fan is off, the remote obviously doesn't work. This defeats the whole purpose of the remote. I then have to get up and walk over to the switch and turn it back on before I use the remote. After adding labels which my child did not read and tape which looked terrible and did not last, I added the following "fix". I have not had a problem since.
I also have a similar set up where another 2 gang box has a switch for an electric fireplace and another for the blower that should always stay on since it has a heat-sensing switch at the plug.
Step 1: Parts
2. Screw terminal for wire
3. A paint pen or small amount of paint to cover chrome parts of terminal.