ET Exclusive: A Day with Levi Johnston and Baby Tripp

Only ET has the first video of new father Levi Johnston at home in Alaska with Sarah Palin's grandson, baby Tripp, doing everything from changing his clothes and playing to diaper duty!

"I think he looks more like me," Levi tells ET. "Everyone I've talked to says he looks more like me."

"Saturday is usually the best day of the week for me. It's the day I get to see my son," says the 19-year-old father, who is in a custody battle with Tripp's mom, Bristol Palin. Right now he only sees Tripp on Saturdays from 9 to 2, but he wants more together time.