"Mister Clay" is a YouTube Channel that has tons of videos using AAC symbols. He doesn't model use on a device, but gives caregivers and parents lots of opportunities for modeling when watching these videos with your kids at home! Check out a few of his videos below:
Tarheel Reader and Tarheel Shared Reader are free, online books that are simple and useful for modeling with AAC. They have lots of options and different topics. Tarheel Shared Reader provides AAC symbols at the bottom of the story to assist in shared reading!A book from Tarheel Shared Reader is below:
Tarheel Reader :https://tarheelreader.org/
Tarheel Shared Reader: https://shared.tarheelreader.org/