My 3 year old daughter never really gravitated to Dora, but they showed a Dora episode introducing Diego and she was hooked. She has learned a lot about other animals than the normal ones they teach in pre-school. She has learned about animals that my wife and I didn't even know existed. Because it is only on 2-3 times during the day, it can be on at the wrong times. Thank god for Tivo. She will watch the same one 2-3 times in a row before I have to convince her to watch another one. The secret is to record from Tivo to a DVD with a recordable DVD player. Saves a lot of money from buying the individual DVDs at $15-20 each. We all know that kids this age cycle through shows about every 2-3 months (except Clifford). That one has stood the test of time.