Get a PC. If something goes wrong you can open the thing up and fix it. That isn't possible with Macs and tablets. Besides, tablets need charging everyday. Macros can make your life easier on PCs. Map hot keys to frequently performed actions. Considering her age, she will probably be using a limited number of programs. All of these can be configured with hot keys. CTRL+F1 to access the internet and fire up the browser, CTRL +F2 to start video-conferencing etc. These hot keys can be noted down in a diary to make life even easier.