Want to see 30 seconds of Pixar’s next movie? I’m not talking about Up, I’m talking about the short film (which will be attached to Up), titled Partly Cloudy. The directorial debut of storyboard artist and animator Peter Sohn (he also provided the voice of Emile in Ratatouille) tells the story of where babies come from.

Click on the image below to see the 30 second clip on Animation World. Also check out a three page interview with Sohn on AWN.

“Everyone knows that the stork delivers babies, but where do the storks get the babies from? The answer lies up in the stratosphere, where cloud people sculpt babies from clouds and bring them to life. Gus, a lonely and insecure grey cloud, is a master at creating “dangerous” babies. Crocodiles, porcupines, rams and more–Gus’s beloved creations are works of art, but more than a handful for his loyal delivery stork partner, Peck. As Gus’s creations become more and more rambunctious, Peck’s job gets harder and harder. How will Peck manage to handle both his hazardous cargo and his friend’s fiery temperament?”

Partly Cloudy will be attached to Up which hits theaters on May 29th, 2009.