You might want to use my nano geo-container for this.
Okay main point for this cache was to send them off to another location ( They read a clue where there would be a log. )
They go off somewhere and find another cache, but it says: " Go back to the first clue as it was with the clue the whole time! " ( Give some distance and they will enjoy the cache! Regardless on how much they had to walk! )
Step 1: What Do We Need.
A nano cache,
an old speaker.
Step 2: Make a Log.
this can just be a peice of paper cut to the correct size to fit in the speeker.
i used a print off from the site.
Step 3: Put the Log In.
this caches log is small and will need to be checked every few finds