>> i am here with the world famous dr. fuster. >> reporter: meet the newest edition to the sesame street family. this cardiologist, dr. valentine fuster partnered with sesame street workshop to teach kids around the world health habits. now a muppet fashioned after himself. >> the rooster says first of all, take care of yourself. health is important for your life. >> reporter: my old friends on sesame street may be getting a mini makeover. give me five. i am so impressed. will regulating the blue monster's cookie intake really do the trick? when it comes to kids' health a three-year experiment in south america put dr. fuster's theories to the test. >> we decided to teach health over a period of 70 hours over six months. and the results of this project have been outstanding. >> reporter: the study presented to the american heart association in november shows