Makaton is a programme designed to help people that have speech and language difficulties. It uses signs, symbols, gestures and speech to help people communicate.
Here is a link to the official Makaton website:
https://www.makaton.org/aboutMakaton/
There is also further information available at this website:
https://www.bbc.co.uk/cbeebies/grownups/makaton
There are lots of videos available online to help children (and grown ups!) learn some basic Makaton signs. Here are a selection:
Speech and Language Blog 