<human>: Can you provide a brief overview of the text?

I've been searching the webs for helpful guides on making the most of an extended layover.  I'm thinking of something with cheap activities near or within the airport.  Do any of you folks have experience in doing something like that?  

My long layover will be in either Frankfurt, Paris, or Abu Dhabi depending on how long of a trip/how cheap I feel when I finally put my money down.  The decision will be made easier by having something to do but I can't find anything useful out there.  Even disregarding my trip, ideas could be very useful for future consideration for all in the sub.
<bot>: cheap, fun, ideas for extended layovers.  Paris/Frankfurt/Abu Dhabi would be nice but general ideas better.