Seems designed to get kids to tap on the ads. – Mary Had A Little Lamb: A Free Preschool Singalong Review

The app is basically seems designed to get your youngest kids to tap on ads within the app. The ads blocks a big part of the graphics, obscuring the story. There is a song that plays in the background as it moves through the story of Mary and her little lamb. This might be a 3-star app at best without the ad. Kids will be more interested in the blinking ads than they will be the story. Avoid.
Review by ChiTownAl on Mary Had A Little Lamb: A Free Preschool Singalong.