Red takes the stairs.

 Red has been toying with the stairs all week, but today he finds the upstairs landing and a new door.

Wow, this is fun - let's play.

Hey, there is another whole set of stairs.  Wonder where they go?   Another day.   I'm tired - need to find my brothers and sister.

OK, back down.   Not so easy.  

All of the others have made it a few steps up, but Red seems to be our explorer, although Blue took off this morning on the far side of the pool and out by the horseshoe pits.