Baby Sign and Sing is an educational app designed for babies and toddlers to learn sign language through nursery rhymes. The app features adorable animated characters that sing and sign along with the nursery rhymes. The free version of the app includes the nursery rhyme "Twinkle, Twinkle Little Star" as a trial.

If you and your child enjoy the app, you have the option to purchase an add-on pack that includes 9 more popular nursery rhymes such as "Row, Row, Row Your Boat" and "Old MacDonald's Farm." The add-on pack is available at a low price and provides great value.

The app is divided into three sections: Explore Signs, Play Song, and Watch Tutorial. The Play Song section is the main attraction, where the animated characters sing the nursery rhymes and sign the ASL keyword signs. The Explore Signs section is an interactive play-pad that allows children to touch different parts of the screen to see the character sign key words associated with the nursery rhyme. The Watch Tutorial section provides explanations of the signs used in the rhyme and offers tips and tricks on how to perform the signs.

Overall, Baby Sign and Sing is a fun and engaging way for babies and toddlers to learn sign language through nursery rhymes. It is a great educational tool for parents who want to introduce their children to sign language at an early age.