Maybe there's a future for them in engineering

Every day after lunch, I take a nap.  Edwin and Joseph take naps too, but the girls are too old for naps (or rather, would wake up Edwin) so I let them play quietly in our third-floor toy room.  When I come get them a few hours later (or longer, depending on how difficult the morning has been), I'm never quite sure what I'll find.  Sometimes the couch is turned into a fort.  The treadmill might be festooned with various scarves.  Sometimes they will have turned a few remaining UAB boxes into forts.  Once I found them both asleep on the couch.

A few days ago, they built a train track.

Not bad for a three and five year-old.  I guess there's nothing like boredom to inspire creative problem solving.