Teletubbies - Season 1 Episode 78 Sand Pendulum
Overview: The Teletubbies enter their Tubbytronic Dome but then the Magic Windmill starts to spin and the Teletubbies watch three children filling up a soft drink bottle with black and white sand and the sand comes out all over the place. Tinky Winky, Dipsy, and Laa Laa follow Po around Teletubbyland.