The other day, I joined the Wiatr family for a stroll through the Arboretum and tried to keep up with their jumping, flipping, tumbling, and all-around gymnastic boys. (Expert, steely-nerved tree-climbers, too.) Nature was cooperative—ducks touched down on the lake in formation, the late-afternoon/early-autumn light streamed through the trees—and we basically let the kids' curiosity guide us along from one spot to the next. The shoot reminded me that it's been years since I've climbed a tree; I'm going to have to do something about that soon.