Sunday Morning Cartoon - Horton hatches the egg

Horton Hatches the Egg is a children's book by Dr. Seuss, first published in 1940. The book, along with Horton Hears a Who later provided the thrust of the plot for the Broadway musical Seussical. The character Horton also appeared in Horton Hears a Who!, published in 1954 and again in the 2008 animated movie with teh same name: [trailer]

source: wikipedia