Possible Clues:

• Yellow Teletubby
• One of the Teletubbies
• Yellow Teletubby with a curly antenna
• Dipsy's playmate
• The yellow Teletubby
• Second smallest Teletubby
• Playmate of Tinky Winky, Dipsy, and Po
• Teletubby with a reduplicative name
• Tinky Winky's playmate
• Second-smallest Teletubby