The Teletubbies celebrate their 10th birthday with co-creators Anne Wood and Andy Davenport in Stratford, Britain, in this undated handout photo, before heading to New York where they will receive the keys to the city. Babies and toddlers are enchanted by the Teletubbies with their brightly colored outfits and bulging tummies but when it comes to learning new words and language skills humans are the best teachers. REUTERS/Ragdoll Worldwide Ltd/Handout