Why Can't I Fly - Riona learns how different all the creatures in the World Tree are when she begins to wonder why birds can fly and sloths can't. Curriculum Objective: We all have different things that we're good at, and others that are more challenging. Big Big Dinner Party - It's a dinner party sloth-style when Snook hosts a dinner to encourage everyone to try new and different healthy foods. Curriculum Objective: Trying new foods can be fun (and delicious!).