Hi, firstly thank you for your support.
There is detailed information about the longitudinal study in the
level 3 handbook page 382+ which offers advice on how to use the observations you make as assessments.
The longitudinal study observes and assesses child development over a planned period of time, so the observation you've posted about provides evidence that, on this occasion the activity was less effective in supporting his focus by only holding his interest for a limited amount of time.
What
child development information are you using to match and track the developmental observations you're making against expected stages?
As far as planning activities to support him, find out what his interests are, the places he spends most time in, who he plays alongside with (even if it appears no verbal communication is taking place) Examine your room layout, where the resources are, how they are being used and how they might be used differently. What does he like to do at home, who with and what routines is he familiar with.
Look at your development chart to see where he currently is, look at what the next steps for him might be. Once you have that information let us know and I'm sure members with activity ideas will add on xx
Development matters guidance
Hope this helps a little xx