[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. 
[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.