We used paper towel tubes instead of paint brushes today!
This is a great example of process art. Even with the same materials (paper, paint, and tubes for stamping), no two pieces are exactly alike! In the early years, allowing kids to explore without too many adult expectations is key to their hands-on way of learning.
If you would like to know more, this is a great article from NAEYC!
Giant Step Preschool and Child Care Center 