I would do a search for that. I know there were devices for that at one time since some garden members have one but it Is pretty old, quite small, only does plain text, and is monochrome. A low end laptop would probably cost the same now as what they paid for it 15 years ago.
These work great for non-technical people- we had one for my mom until her Alzheimer's got too bad. It allows the younger technically savy generation to communicate and keep in touch with the not so savy (possibly older??) generation! It's a lot easier to get a kid to send Grandma an Email that to write a letter!