I don't know why but I get very excited about leathery seed pods that rattle. These catalpa pods are perfect. They seem like they should be used in a rhythm band or something. These are slightly beaten up, having been peeled from the boardwalk at the Audubon bird sanctuary. One was still filled with gooey green gel but a perfectly round stone-like seed popped out of the bottom one. I also found these little boxy pods with holes in the exact center of the tops through which tiny seeds sprinkled. The endless amusements of the whole seed operation!