Okay, Help: What's Your Ideal Afternoon in Brooklyn for Tourists?

Say that you had two friends who had literally never been to Brooklyn. (This may actually not be impossible that you do have such friends.) And these two friends are coming to New York City this weekend, and they have blocked out Saturday morning and afternoon to Experience the Wonders of New York City's most populous borough (and the state's most populous county)!
I've been stumped for weeks about their itinerary and so I turn to you. Now, while I'm tempted to send them for a walk along the Gowanus (there are bat houses alongside the Gowanus now! I love it!), that seems unsporting and like something that [...]


