D.W. and Arthur think back to before their sister Kate arrived. Lionel's new friend Gus is a super hopper and a real funny bunny. We may not understand what they are saying but all animals talk to eachother. Some of the biggest communicators are elephants. The best way for humans, and sometimes lemurs, to communicate is by writing letters.
Chimps use their faces and wolves use their scents to communicate.
A special rock in the backyard turns out to be a fossil. Caillou gets to go to work with his mommy. Gilbert is determined to move a very sizable rock from one side of the garden to the other. Good thing they have Quetzel to make things right. In the second episode, Wheezie needs to work on her patience.