Rocks and Waiting

We had to wait for a long while recently.  We were waiting for a drive and, as it happens occasionally, we had a long stretch of waiting to play without back up (i.e. money or technology or books). A wedge of dread sat in my heart at first.  Great!  2 kids, $1.35 and about an hour and a half to play with.
At first, the kids were content to make a big project of selecting something from the vending machine for $1.35.  That took about 10 minutes.  Reading all the little signs in the entrance of the building we were waiting in (and spinning on the high stools) took about another 10.  Okay.  Just 1 hour and 10 minutes to go.
Then, the kids decided to go outside.  There is a chain of very interesting boulders just outside the doors.  Voila, 1 hours and 20 minutes vanished without a trace.  The kids did rock climbing, story telling, timing how long they could balance and conducting races from rock to rock.  It turns out there is more to meet the eye when it comes to rocks and waiting.