All the resources in this module would be useful. I really like the idea of using Stellarium, it can be very abstract to talk about space and the night sky during the daytime. This resource is great to put an image with the discussion.
The activity I would use with first and second class is ‘Where do you live?’. I would begin with identifying rooms and features in a house. We would do a walk around the school and tick off any of these features we see in our school. We would then extend this by completing a walk of our locality. On this walk the children would complete a checklist of features they see, flat roof, tiled roof, slate roof, conservatory, bay window, solar panels, two storey, bungalow, terraced, detached, semi-detached, etc. When we return to the school we would discuss what we noticed and how many of these features exist in our own houses. Finally the children would complete models of their own homes using play doh or junk art materials.