In verses 9-10, the Lord instructed Abram to bring a heifer or 3 years old, a she-goat of 3 years old, a ram of 3 years old, a turtledove, and a young pigeon.
The heifer, she-goat, and ram were divided and each piece was placed one against another.
The birds were not divided and when they flew down upon the carcasses, Abram drove them away.
I had a student draw these animals on a large sheet of paper and had two students for each animal come up to the front of the classroom and hold the drawings. As soon as they were all up front, I took scissors and cut the picture (animal) in half. Then we went out in to the hallway and I taped the halves of each animal on opposites of the hall.
Once the pictures were taped up, I had them walk between the carcass pieces as if they were Abram. In ancient times, the person passing between the carcasses was essentially sayng, "May I also be cut in two if I do not keep my part of the covenant?"
Our classroom has 2 doors so I had my students exit one door, we taped up the pictures, they walked between them, and entered the other door. Upon returning to class, I asked them to read Genesis 15:9-21 and we discussed the symbolism of this as it relates to the Abrahamic Covenant.