This was one of my all time favourite activities to set up in my Reception classrooms. A large collage in one or two colours to work on collaboratively. Its a great activity to support sharing and discussion, it can help reluctant talkers talk as they focus on painting or sticking and it can be used for all sorts of great displays either as is or when cut up.
I decided in our week of colour based activities to set something similar up for L, I decided on blue as we are also making links back to our visit to the Tate Modern and the Matisse exhibition a few months ago.