love these collaborative pieces: could name these "Our Cool Dot" "Our Warm Dot" after reading "The Dot" and giving each student 2 dots of their own (one to decorate with cool colors and one with warm colors)
Use to reinforce color schemes. If this was done with photos it would take about an hour. Simply put different filters on the same photo, print, cut, glue on a canvas or board. I would mod podge in matte for some texture.
Idea: students bring in one to two fruits or vegetables to observe and paint. Art Projects for Kids: Vegetable Garden Watercolor Painting. This will be great to celebrate our spring garden planting we are doing.