TV remote adapter for elderly

In the Netherlands Telfort/KPN are cable tv suppiers. Their remote has many buttons. Elderly people often do not understand the functions of those buttons and keep pushing the wrong buttons ending up in menus they do not understand. For my mother in law (86 years old) I wanted a simple remote with only the basic buttons. So I printed an adapter which covers a lot of the buttons she should not use. She now can only use the most basic buttons..