1940s Child's Crayon Drawing: Be Kind to Animals!

This is one of a handful of drawings I'm listing, all done by a kid with the initials of J.B in the 1940s. I love them all, but the little bluebird in this one, making its way to the orange and blue birdhouse nearby, especially kills me!  And a pretty great mantra, too, which is especially satisfying to see written in bold uppercase black crayon drawn letters!

12 1/4" x 9 1/8" and in. Crayon on construction paper, which is a bit brittle.  Overall good condition, with a flag to the upper right corner.