Both are early fun stories of Clarke, both among his good ones.
- "Travel by Wire!"; download: A materialization/dematerialization device that transports things & people over telephone wires! This is, I think, his first published story.
- "How We Went to Mars"; download (need to scroll down the page): Teen adventurers "accidentally" end up on Mars rather than having just a local trip in their neighborhood (in their home-built rocket)!
Related: Arthur Clarke's short fiction, novels, collections.