Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to make a walkie talkie [title] Gather your materials. [step] For this simple project, you'll need : [substeps] Two tin or aluminum cans, or two papers cups five-to-ten meters of string a hammer a nail two tin or aluminum cans will hold up better than plastic ones. The string is less likely to tear through the bottom of a tin or aluminum can.

Ending1: You'll also need a few bobby pins. A wooden dowel or wooden spoon will also work. Ending2: If you don't have a tin or aluminum can, you can use metal tongs. See the tips for materials included in this article. Ending3: [title] Poke the nail through the bottom of each can/cup. [step] Make the holes in the cans large enough to feed the string through the holes. Ending4: Two pieces of string, or twine, should also work nicely. Another alternative is a bunch of ribbon or long grass.

Answer format: ending1/ending2/ending3/ending4