After a couple of days of, 'Mummy play with me!' every five minutes, I realised that somehow Sumo seemed to have forgotten how to play independently. After an inspirational post by a wonderful provider I decided to set up an invitation to play for the morning for Sumo.
There was to one side a large box of various cardboard resources, a large box of little people and a box of cars. All kinds of scenarios were played out over the first 3-4 hours of the following mornings, and I got to surf and drink coffee and enjoy watching my son instead of leading his play.