The paediatrician has recommended I use these to support DS's communication and understanding, but I'm a totally clueless. Where do I start? Can anyone recommend any resources, websites, books, apps I can use to get started?
I'm very surprised, given that the paed recommended it to you, that they haven't offered you a place on a SALT course or similar. We have just started PECS and visual timetables within the last month after attending a 4-week NHS SALT course. It was amazingly helpful! Maybe something worth asking if they offer?
There is an official, branded pecs website. I bought the a5 size plastic ring binder and extra inserts. Then I took photos of everything that was part Of DS' world: different foods, toys, people, places, buildings, things like the potty, bath, bed etc. I got these printed in Jessops credit card size, and laminated them. Then put sticky Velcro on the backs. Then we moved through the stages of pecs to teach it.