Just started with my Nieces and Nephew and my Daughter and it is cheap to do and pretty fun 
we did it in Tucson
It is fun for sure
Never heard of it before now.
I put a cache in every crawlspace I inspect. Not really, my wife has done it for a number of years, if were on a trip I’ll do it with her. She set out some travel bugs in Wash State with the goal of getting them back to NC for her students. One just made it back took about 4 years.
That is cool Only 4 years