Three dogs sleep contentedly by the fire as three cats play with three mice. This dog image could be used in sections as well as for a great way to teach sets of three and multiplication.
This is one of a number of drawings the I felt deserved being included on Reusable Art from The Nursery, April 1877, Vol. XXI. No. 4.
This image is copyright free and in the public domain anywhere that extends copyrights 70 years after death or at least 120 years after publication when the original illustrator is unknown.