During the years that I taught weekly units about each of the classes of vertebrates, I acquired some great amphibian, reptile, bird, and mammal earrings. Often I could use them somehow as extra credit on a quiz or a lab practical. Frogs have long legs for jumping. Toads don't leap. They have shorter legs.
Today the weather forecast spring, with winter to make another comeback tomorrow. One pair of my third graders chose frogs for their poem with two voices. I knew that peepers would be peeping when I returned home this evening. So I chose these leaping frogs today. Leaping into Spring.