Beaks and Bills - After an unsuccessful attempt to tie a know with his wings, Izzy struggles to tie one using his beak. This leads the gang to wonder how other birds use their beaks. Educational Objective: Viewers will observe how a bird's beak determines the food it eats. The Mighty Oak Tree - When an acorn hits Izzy on the head, Sammy thinks the sky is falling. But the explorers soon discover that it's only an acorn falling from a tree. Then they investigate how acorns turn into oak trees. Educational Objective: Viewers will observe how oak trees are homes to a number of different animals.