Out on a Limb: It's his birthday and Winslow decides to go where no marmoset has ever gone before - up to the very top of the World Tree. But when he gets stuck on a high branch and has to be rescued, he realizes that even though he's older he still needs to be safe. The More Things Change: On a day of many changes in the World Tree, Ick and the monkeys are sad that things can't stay the same forever. But, thanks to Snook, they learn that change can be great and some things, like friendship, never have to change. EDUCATIONAL OBJECTIVES: Natural Limits - Every creature has different physical limits. There are some places in nature where only a few (or no) species can safely exist. The More Things Change - The world changes in some ways and stays the same in others. We also change in some ways and stay the same in others. Changes create opportunities and benefits.