Beth has chosen some pictures with words Harry already knows, such as apple and banana and some he won’t say like “bus” or “hat”.
Harry has to fish the pictures then post them in the mail box. Last session he posted coloured envelopes so she is working on the same mechanics of play but now introducing words.
When I did this with him at home the next day he said ” hat” for the first time- of course I didn’t have the video around!!!