Low-tech options for AAC can include paper-based communication boards and books. In general, communication boards lack the robust vocabulary an AAC user needs; particularly when they offer no way to talk about something that is not specific to that board or activity.
This video is a quick explanation of how books and boards can work for your AAC users.
You might also like my other videos in this series, as well as the following instructional materials:
Core Words to Go
AAC Picture Communication Book with Core and Fringe words
Activity Based Communication Boards