It's Ojo's birthday. She already knows that everyone's put together a big party for her, but she doesn't know about some special surprises. These include the biggest of all --- a visit from her good friend Ursa. Pip and Pop learn just how important it is to keep such a surprise. Treelo also learns something about surprises --- that sometimes they are fun, but the wrong kind of surprise can be scary. In the Shadow segment, Shadow sings a verse of "Pop Goes the Weasel." Songs Surprise! (Big Blue House Song) Happy, Happy Birthday (shortened version)