While walking through the forest, E noticed a long branch hanging from a tree. "Look, it's hanging down. It goes all the way up there, but I can reach it down here!" She gave it a tug and realized it was stuck. B turned around and watched how the branch swung back and forth when E would let go of it. That seemed to give him and some others an idea. B grabbed the branch between his hands, jumped up while holding on tight, and lifted his legs. No luck. He was unsuccessful in his attempt to swing on the branch. "You have to be strong to swing on it!" E stepped up, grabbed the branch, jumped up, and swung gracefully above the forest floor. "E is swinging upside down! He is so strong! I think I can swing like that too if I take off these big gloves." The boys took turns swinging above the ground. They giggled as they would swing and fall or land gracefully on both feet. Do you just need to...